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Mobile phone
are called cellular telephones or cell phones, in North America. In addition to telephony, 2000s-era mobile phones support a variety of other services

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"Cell phone" redirects here. For the film, see Cell Phone (film). "Handphone" redirects here. For the film, see Handphone (film). For the mobile personal computer, see Smartphone.

Evolution of mobile phones, to an early smartphone

A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use a cellular network architecture, and, therefore, mobile telephones are called cellular telephones or cell phones, in North America. In addition to telephony, 2000s-era mobile phones support a variety of other services, such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, video games, and digital photography. Mobile phones offering only those capabilities are known as feature phones; mobile phones which offer greatly advanced computing capabilities are referred to as smartphones.

The first handheld mobile phone was demonstrated by John F. Mitchell[1][2] and Martin Cooper of Motorola in 1973, using a handset weighing c. 2 kilograms (4.4 lbs).[3] In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan.[4] In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion.[5] In first quarter of 2016, the top smartphone developers worldwide were Samsung, Apple, and Huawei, with smartphone sales represented 78 percent of total mobile phone sales.[6] For feature phones (or "dumbphones") as of 2016, the largest were Samsung, Nokia, and Alcatel.[7]

Contents
  • 1 History
  • 2 Types
    • 2.1 Smartphone
    • 2.2 Feature phone
    • 2.3 Kosher phone
  • 3 Hardware
    • 3.1 Sound
    • 3.2 Battery and battery life
    • 3.3 SIM card
  • 4 Infrastructure
  • 5 Software
    • 5.1 Text messaging
  • 6 Sales
    • 6.1 By manufacturer
    • 6.2 By mobile phone operator
  • 7 Use
    • 7.1 General
    • 7.2 Content distribution
    • 7.3 Mobile banking and payment
    • 7.4 Mobile tracking
    • 7.5 While driving
    • 7.6 Health effects
    • 7.7 Educational impact
    • 7.8 Electronic waste regulation
    • 7.9 Theft
  • 8 Future
  • 9 Conflict minerals
  • 10 See also
  • 11 References
  • 12 Further reading
  • 13 External links
History Main article: History of mobile phones Martin Cooper of Motorola made the first publicized handheld mobile phone call on a prototype DynaTAC model on 4 April 1973. This is a reenactment in 2007.

A handheld mobile radio telephone service was envisioned in the early stages of radio engineering. In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "pocket-size folding telephone with a very thin carbon microphone". Early predecessors of cellular phones included analog radio communications from ships and trains. The race to create truly portable telephone devices began after World War II, with developments taking place in many countries. The advances in mobile telephony have been traced in successive "generations", starting with the early zeroth-generation (0G) services, such as Bell System's Mobile Telephone Service and its successor, the Improved Mobile Telephone Service. These 0G systems were not cellular, supported few simultaneous calls, and were very expensive.

The Motorola DynaTAC 8000X. First commercially available handheld cellular mobile phone, 1984.

The first handheld cellular mobile phone was demonstrated by John F. Mitchell[1][2] and Martin Cooper of Motorola in 1973, using a handset weighing 2 kilograms (4.4 lb).[3] The first commercial automated cellular network was launched in Japan by Nippon Telegraph and Telephone in 1979. This was followed in 1981 by the simultaneous launch of the Nordic Mobile Telephone (NMT) system in Denmark, Finland, Norway, and Sweden.[8] Several other countries then followed in the early to mid-1980s. These first-generation (1G) systems could support far more simultaneous calls but still used analog cellular technology. In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone.

In 1991, the second-generation (2G) digital cellular technology was launched in Finland by Radiolinja on the GSM standard. This sparked competition in the sector as the new operators challenged the incumbent 1G network operators.

Ten years later, in 2001, the third generation (3G) was launched in Japan by NTT DoCoMo on the WCDMA standard.[9] This was followed by 3.5G, 3G+ or turbo 3G enhancements based on the high-speed packet access (HSPA) family, allowing UMTS networks to have higher data transfer speeds and capacity.

By 2009, it had become clear that, at some point, 3G networks would be overwhelmed by the growth of bandwidth-intensive applications, such as streaming media.[10] Consequently, the industry began looking to data-optimized fourth-generation technologies, with the promise of speed improvements up to ten-fold over existing 3G technologies. The first two commercially available technologies billed as 4G were the WiMAX standard, offered in North America by Sprint, and the LTE standard, first offered in Scandinavia by TeliaSonera.

Types Smartphone Main article: Smartphone Active mobile broadband subscriptions per 100 inhabitants.[11]

Smartphones have a number of distinguishing features. The International Telecommunication Union measures those with Internet connection, which it calls Active Mobile-Broadband subscriptions (which includes tablets, etc.). In the developed world, smartphones have now overtaken the usage of earlier mobile systems. However, in the developing world, they account for around 50% of mobile telephony.

Feature phone Main article: Feature phone

Feature phone is a term typically used as a retronym to describe mobile phones which are limited in capabilities in contrast to a modern smartphone. Feature phones typically provide voice calling and text messaging functionality, in addition to basic multimedia and Internet capabilities, and other services offered by the user's wireless service provider. A feature phone has additional functions over and above a basic mobile phone which is only capable of voice calling and text messaging.[12][13] Feature phones and basic mobile phones tend to use a proprietary, custom-designed software and user interface. By contrast, smartphones generally use a mobile operating system that often shares common traits across devices.

Kosher phone

There are Orthodox Jewish religious restrictions which, by some interpretations, standard mobile telephones overstep. To deal with this problem, some rabbinical organizations have recommended that phones with text-messaging capability not be used by children.[14] Phones with restricted features are known as kosher phones and have rabbinical approval for use in Israel and elsewhere by observant Orthodox Jews. Although these phones are intended to prevent immodesty, some vendors report good sales to adults who prefer the simplicity of the devices. Some phones are approved for use by essential workers (such as health, security, and public service workers) on the sabbath, even though the use of any electrical device is generally prohibited during this time.[15]

Hardware Main article: Mobile phone features

The common components found on all phones are:

  • A battery, providing the power source for the phone functions.
  • An input mechanism to allow the user to interact with the phone. These are a keypad for feature phones and touch screens for most smartphones.
  • A screen which echoes the user's typing, and displays text messages, contacts, and more.
  • Basic mobile phone services to allow users to make calls and send text messages.
  • All GSM phones use a SIM card to allow an account to be swapped among devices. Some CDMA devices also have a similar card called an R-UIM.
  • Individual GSM, WCDMA, iDEN and some satellite phone devices are uniquely identified by an International Mobile Equipment Identity (IMEI) number.

Low-end mobile phones are often referred to as feature phones and offer basic telephony. Handsets with more advanced computing ability through the use of native software applications are known as smartphones.

Sound

In sound, smartphones and feature phones vary little. Some audio-quality enhancing features, such as Voice over LTE and HD Voice, have appeared and are often available on newer smartphones. Sound quality can remain a problem due to the design of the phone, the quality of the cellular network and compression algorithms used in long distance calls.[16][17] Audio quality can be improved using a VoIP application over WiFi.[18] Cellphones have small speakers so that the user can use a speakerphone feature and talk to a person on the phone without holding it to their ear. The small speakers can also be used to listen to digital audio files of music or speech or watch videos with an audio component, without holding the phone close to the ear.

Battery and battery life

The average phone battery lasts 2-3 years at best. Many of the wireless devices use a Lithium-Ion (Li-Ion) battery, which charges 500-2500 times, depending on how users take care of the battery and the charging techniques used.[19] It is only natural for these rechargeable batteries to chemically age, which is why the performance of the battery when used for a year or two will begin to deteriorate. Battery life can be extended by draining it regularly, not overcharging it, and keeping it away from heat.[20][21]

SIM card Main articles: Subscriber Identity Module and Removable User Identity Module Typical mobile phone mini-SIM card.

GSM feature phones require a small microchip called a Subscriber Identity Module or SIM card, in order to function. The SIM card is approximately the size of a small postage stamp and is usually placed underneath the battery in the rear of the unit. The SIM securely stores the service-subscriber key (IMSI) and the Ki used to identify and authenticate the user of the mobile phone. The SIM card allows users to change phones by simply removing the SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device, provided that this is not prevented by a SIM lock. The first SIM card was made in 1991 by Munich smart card maker Giesecke & Devrient for the Finnish wireless network operator Radiolinja.[citation needed]

A hybrid mobile phone can hold up to four SIM cards, with a phone having an IMEI per SIM Card. SIM and R-UIM cards may be mixed together to allow both GSM and CDMA networks to be accessed. From 2010 onwards, such phones became popular in emerging markets,[22] and this was attributed to the desire to obtain the lowest on-net calling rate.

Infrastructure Main articles: Cellular network and WiFi

Mobile phones communicate with cell towers that are placed to give coverage across a telephone service area which is divided up into 'cells'. Each cell uses a different set of frequencies from neighbouring cells, and will typically be covered by 3 towers placed at different locations. The cell towers are usually interconnected to each other and the phone network and the internet by wired connections. Due to bandwidth limitations each cell will have a maximum number of cell phones it can handle at once. The cells are therefore sized depending on the expected usage density, and may be much smaller in cities. In that case much lower transmitter powers are used to avoid broadcasting beyond the cell.

As a phone moves around, a phone will "hand off"- automatically disconnect and reconnect to the tower that gives the best reception.

Additionally, short-range Wi-Fi infrastructure is often used by smartphones as much as possible as it offloads traffic from cell networks on to local area networks.

Software Text messaging Main article: SMS A text message (SMS).

A common data application on mobile phones is Short Message Service (SMS) text messaging. The first SMS message was sent from a computer to a mobile phone in 1992 in the UK while the first person-to-person SMS from phone to phone was sent in Finland in 1993. The first mobile news service, delivered via SMS, was launched in Finland in 2000,[citation needed] and subsequently many organizations provided "on-demand" and "instant" news services by SMS. Multimedia Messaging Service (MMS) was introduced in 2001.[citation needed]

Sales By manufacturer See also: List of best-selling mobile phones and List of mobile phone makers by country Market share of top-five worldwide mobile phone vendors, Q2 2016 Rank Manufacturer Strategy
Analytics
report[23] 1 Samsung 22.3% 2 Apple 12.9% 3 Huawei 8.9% 4 Oppo 5.4% 5 Xiaomi 4.5% Others 46.0% Note: Vendor shipments are
branded shipments and exclude
OEM sales for all vendors

From 1983 to 1998, Motorola was market leader in mobile phones. Nokia was the market leader in mobile phones from 1998 to 2012.[24] In Q1 2012, Samsung surpassed Nokia, selling 93.5 million units as against Nokia's 82.7 million units. Samsung has retained its top position since then. In 2017, the top five manufacturers worldwide were Samsung (20.9%), Apple (14.0%), Huawei (9.8%), Oppo (5.7%), and Vivo (6.5%).[25] During Q2 2018, Huawei overtook Apple as the world's second-largest phone manufacturer.[26]

By mobile phone operator Main article: Mobile phone operator Growth in mobile phone subscribers per country from 1980 to 2009.

The world's largest individual mobile operator by number of subscribers is China Mobile, which has over 500 million mobile phone subscribers.[27] Over 50 mobile operators have over ten million subscribers each, and over 150 mobile operators had at least one million subscribers by the end of 2009.[28] In 2014, there were more than seven billion mobile phone subscribers worldwide, a number that is expected to keep growing.

Use General Mobile phone subscribers per 100 inhabitants. 2014 figure is estimated.

Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business, and in order to have access to a telephone in the event of an emergency. Some people carry more than one mobile phone for different purposes, such as for business and personal use. Multiple SIM cards may be used to take advantage of the benefits of different calling plans. For example, a particular plan might provide for cheaper local calls, long-distance calls, international calls, or roaming.

The mobile phone has been used in a variety of diverse contexts in society. For example:

  • A study by Motorola found that one in ten mobile phone subscribers have a second phone that is often kept secret from other family members. These phones may be used to engage in such activities as extramarital affairs or clandestine business dealings.[29]
  • Some organizations assist victims of domestic violence by providing mobile phones for use in emergencies. These are often refurbished phones.[30]
  • The advent of widespread text-messaging has resulted in the cell phone novel, the first literary genre to emerge from the cellular age, via text messaging to a website that collects the novels as a whole.[31]
  • Mobile telephony also facilitates activism and public journalism being explored by Reuters and Yahoo![32] and small independent news companies such as Jasmine News in Sri Lanka.[citation needed]
  • The United Nations reported that mobile phones have spread faster than any other form of technology and can improve the livelihood of the poorest people in developing countries, by providing access to information in places where landlines or the Internet are not available, especially in the least developed countries. Use of mobile phones also spawns a wealth of micro-enterprises, by providing such work as selling airtime on the streets and repairing or refurbishing handsets.[33]
  • In Mali and other African countries, people used to travel from village to village to let friends and relatives know about weddings, births, and other events. This can now be avoided in areas with mobile phone coverage, which are usually more extensive than areas with just land-line penetration.
  • The TV industry has recently started using mobile phones to drive live TV viewing through mobile apps, advertising, social TV, and mobile TV.[34] It is estimated that 86% of Americans use their mobile phone while watching TV.
  • In some parts of the world, mobile phone sharing is common. Cell phone sharing is prevalent in urban India, as families and groups of friends often share one or more mobile phones among their members. There are obvious economic benefits, but often familial customs and traditional gender roles play a part.[35] It is common for a village to have access to only one mobile phone, perhaps owned by a teacher or missionary, which is available to all members of the village for necessary calls.[36]
Content distribution

In 1998, one of the first examples of distributing and selling media content through the mobile phone was the sale of ringtones by Radiolinja in Finland. Soon afterwards, other media content appeared, such as news, video games, jokes, horoscopes, TV content and advertising. Most early content for mobile phones tended to be copies of legacy media, such as banner advertisements or TV news highlight video clips. Recently, unique content for mobile phones has been emerging, from ringtones and ringback tones to mobisodes, video content that has been produced exclusively for mobile phones.

Mobile banking and payment Mobile payment system. Main articles: Mobile banking and Mobile payment See also: Branchless banking and Contactless payment

In many countries, mobile phones are used to provide mobile banking services, which may include the ability to transfer cash payments by secure SMS text message. Kenya's M-PESA mobile banking service, for example, allows customers of the mobile phone operator Safaricom to hold cash balances which are recorded on their SIM cards. Cash can be deposited or withdrawn from M-PESA accounts at Safaricom retail outlets located throughout the country and can be transferred electronically from person to person and used to pay bills to companies.

Branchless banking has also been successful in South Africa and the Philippines. A pilot project in Bali was launched in 2011 by the International Finance Corporation and an Indonesian bank, Bank Mandiri.[37]

Another application of mobile banking technology is Zidisha, a US-based nonprofit micro-lending platform that allows residents of developing countries to raise small business loans from Web users worldwide. Zidisha uses mobile banking for loan disbursements and repayments, transferring funds from lenders in the United States to borrowers in rural Africa who have mobile phones and can use the Internet.[38]

Mobile payments were first trialled in Finland in 1998 when two Coca-Cola vending machines in Espoo were enabled to work with SMS payments. Eventually, the idea spread and in 1999, the Philippines launched the country's first commercial mobile payments systems with mobile operators Globe and Smart.

Some mobile phones can make mobile payments via direct mobile billing schemes, or through contactless payments if the phone and the point of sale support near field communication (NFC).[39] Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators, and retail merchants.[40][41][42]

Mobile tracking See also: Cellphone surveillance and Mobile phone tracking

Mobile phones are commonly used to collect location data. While the phone is turned on, the geographical location of a mobile phone can be determined easily (whether it is being used or not) using a technique known as multilateration to calculate the differences in time for a signal to travel from the mobile phone to each of several cell towers near the owner of the phone.[43][44]

The movements of a mobile phone user can be tracked by their service provider and if desired, by law enforcement agencies and their governments. Both the SIM card and the handset can be tracked.[43]

China has proposed using this technology to track the commuting patterns of Beijing city residents.[45] In the UK and US, law enforcement and intelligence services use mobile phones to perform surveillance operations. They possess technology that enables them to activate the microphones in mobile phones remotely in order to listen to conversations which take place near the phone.[46][47]

Hackers are able to track a phone's location, read messages, and record calls, just by knowing the phone number.[48]

While driving Main articles: Mobile phones and driving safety and Texting while driving A driver using two hand-held mobile phones at once. A sign in the U.S. restricting cell phone use to certain times of day

Mobile phone use while driving, including talking on the phone, texting, or operating other phone features, is common but controversial. It is widely considered dangerous due to distracted driving. Being distracted while operating a motor vehicle has been shown to increase the risk of accidents. In September 2010, the US National Highway Traffic Safety Administration (NHTSA) reported that 995 people were killed by drivers distracted by cell phones. In March 2011, a U.S. insurance company, State Farm Insurance, announced the results of a study which showed 19% of drivers surveyed accessed the Internet on a smartphone while driving.[49] Many jurisdictions prohibit the use of mobile phones while driving. In Egypt, Israel, Japan, Portugal, and Singapore, both handheld and hands-free use of a mobile phone (which uses a speakerphone) is banned. In other countries, including the UK and France and in many U.S. states, only handheld phone use is banned while hands-free use is permitted.

A 2011 study reported that over 90% of college students surveyed text (initiate, reply or read) while driving.[50] The scientific literature on the dangers of driving while sending a text message from a mobile phone, or texting while driving, is limited. A simulation study at the University of Utah found a sixfold increase in distraction-related accidents when texting.[51]

Due to the increasing complexity of mobile phones, they are often more like mobile computers in their available uses. This has introduced additional difficulties for law enforcement officials when attempting to distinguish one usage from another in drivers using their devices. This is more apparent in countries which ban both handheld and hands-free usage, rather than those which ban handheld use only, as officials cannot easily tell which function of the mobile phone is being used simply by looking at the driver. This can lead to drivers being stopped for using their device illegally for a phone call when, in fact, they were using the device legally, for example, when using the phone's incorporated controls for car stereo, GPS or satnav.

A 2010 study reviewed the incidence of mobile phone use while cycling and its effects on behaviour and safety.[52] In 2013, a national survey in the US reported the number of drivers who reported using their cellphones to access the Internet while driving had risen to nearly one of four.[53] A study conducted by the University of Vienna examined approaches for reducing inappropriate and problematic use of mobile phones, such as using mobile phones while driving.[54]

Accidents involving a driver being distracted by talking on a mobile phone have begun to be prosecuted as negligence similar to speeding. In the United Kingdom, from 27 February 2007, motorists who are caught using a hand-held mobile phone while driving will have three penalty points added to their license in addition to the fine of £60.[55] This increase was introduced to try to stem the increase in drivers ignoring the law.[56] Japan prohibits all mobile phone use while driving, including use of hands-free devices. New Zealand has banned hand-held cell phone use since 1 November 2009. Many states in the United States have banned texting on cell phones while driving. Illinois became the 17th American state to enforce this law.[57] As of July 2010, 30 states had banned texting while driving, with Kentucky becoming the most recent addition on 15 July.[58]

Public Health Law Research maintains a list of distracted driving laws in the United States. This database of laws provides a comprehensive view of the provisions of laws that restrict the use of mobile communication devices while driving for all 50 states and the District of Columbia between 1992 when first law was passed, through 1 December 2010. The dataset contains information on 22 dichotomous, continuous or categorical variables including, for example, activities regulated (e.g., texting versus talking, hands-free versus handheld), targeted populations, and exemptions.[59]

In 2010, an estimated 1500 pedestrians were injured in the US while using a cellphone and some jurisdictions have attempted to ban pedestrians from using their cellphones.[60][61]

Health effects Main article: Mobile phone radiation and health See also: Nomophobia and Mobile phone overuse

The effect of mobile phone radiation on human health is the subject of recent[when?] interest and study, as a result of the enormous increase in mobile phone usage throughout the world. Mobile phones use electromagnetic radiation in the microwave range, which some believe may be harmful to human health. A large body of research exists, both epidemiological and experimental, in non-human animals and in humans. The majority of this research shows no definite causative relationship between exposure to mobile phones and harmful biological effects in humans. This is often paraphrased simply as the balance of evidence showing no harm to humans from mobile phones, although a significant number of individual studies do suggest such a relationship, or are inconclusive. Other digital wireless systems, such as data communication networks, produce similar radiation.[citation needed]

On 31 May 2011, the World Health Organization stated that mobile phone use may possibly represent a long-term health risk,[62][63] classifying mobile phone radiation as "possibly carcinogenic to humans" after a team of scientists reviewed studies on mobile phone safety.[64] The mobile phone is in category 2B, which ranks it alongside coffee and other possibly carcinogenic substances.[65][66]

Some recent[when?] studies have found an association between mobile phone use and certain kinds of brain and salivary gland tumors. Lennart Hardell and other authors of a 2009 meta-analysis of 11 studies from peer-reviewed journals concluded that cell phone usage for at least ten years "approximately doubles the risk of being diagnosed with a brain tumor on the same ('ipsilateral') side of the head as that preferred for cell phone use".[67]

One study of past mobile phone use cited in the report showed a "40% increased risk for gliomas (brain cancer) in the highest category of heavy users (reported average: 30 minutes per day over a 10‐year period)".[68] This is a reversal of the study's prior position that cancer was unlikely to be caused by cellular phones or their base stations and that reviews had found no convincing evidence for other health effects.[63][69] However, a study published 24 March 2012, in the British Medical Journal questioned these estimates because the increase in brain cancers has not paralleled the increase in mobile phone use.[70] Certain countries, including France, have warned against the use of mobile phones by minors in particular, due to health risk uncertainties.[71] Mobile pollution by transmitting electromagnetic waves can be decreased up to 90% by adopting the circuit as designed in mobile phone and mobile exchange.[72]

In May 2016, preliminary findings of a long-term study by the U.S. government suggested that radio-frequency (RF) radiation, the type emitted by cell phones, can cause cancer.[73][74]

Educational impact See also: Mobile phone use in schools

A study by the London School of Economics found that banning mobile phones in schools could increase pupils' academic performance, providing benefits equal to one extra week of schooling per year.[75]

Electronic waste regulation Scrapped mobile phones. See also: Mobile phone recycling

Studies have shown that around 40–50% of the environmental impact of mobile phones occurs during the manufacture of their printed wiring boards and integrated circuits.[76]

The average user replaces their mobile phone every 11 to 18 months,[77] and the discarded phones then contribute to electronic waste. Mobile phone manufacturers within Europe are subject to the WEEE directive, and Australia has introduced a mobile phone recycling scheme.[78]

Apple Inc. had an advanced robotic disassembler and sorter called Liam specifically for recycling outdated or broken iPhones.

Theft

According to the Federal Communications Commission, one out of three robberies involve the theft of a cellular phone.[citation needed] Police data in San Francisco show that half of all robberies in 2012 were thefts of cellular phones.[citation needed] An online petition on Change.org, called Secure our Smartphones, urged smartphone manufacturers to install kill switches in their devices to make them unusable if stolen. The petition is part of a joint effort by New York Attorney General Eric Schneiderman and San Francisco District Attorney George Gascón and was directed to the CEOs of the major smartphone manufacturers and telecommunication carriers.[79] On Monday, 10 June 2013, Apple announced that it would install a "kill switch" on its next iPhone operating system, due to debut in October 2013.[80]

All mobile phones have a unique identifier called IMEI. Anyone can report their phone as lost or stolen with their Telecom Carrier, and the IMEI would be blacklisted with a central registry.[81] Telecom carriers, depending upon local regulation can or must implement blocking of blacklisted phones in their network. There are, however, a number of ways to circumvent a blacklist. One method is to send the phone to a country where the telecom carriers are not required to implement the blacklisting and sell it there,[82] another involves altering the phone's IMEI number.[83] Even so, blacklisted phones typically have less value on the second-hand market if the phones original IMEI is blacklisted.

An unusual example of a phone bill caused by theft (reported on 28 June 2018) was when a biological group in Poland put a GPS tracker on a white stork and released it; during autumn migration over the Blue Nile valley in eastern Sudan someone got hold of the stork's GPS tracker, and found in it a mobile-phone-type sim card, which he put in his mobile phone, and made 20 hours of calls on it, running up a bill of over 10,000 Polish zlotys (= $2700) for the biological group.[84]

Future Main article: 5G

5G is a technology and term used in research papers and projects to denote the next major phase in mobile telecommunication standards beyond the 4G/IMT-Advanced standards. The term 5G is not officially used in any specification or official document yet made public by telecommunication companies or standardization bodies such as 3GPP, WiMAX Forum or ITU-R. New standards beyond 4G are currently being developed by standardization bodies, but they are at this time seen as under the 4G umbrella, not for a new mobile generation.

Conflict minerals See also: Conflict minerals

Demand for metals used in mobile phones and other electronics fuelled the Second Congo War, which claimed almost 5.5 million lives.[85] In a 2012 news story, The Guardian reported: "In unsafe mines deep underground in eastern Congo, children are working to extract minerals essential for the electronics industry. The profits from the minerals finance the bloodiest conflict since the second world war; the war has lasted nearly 20 years and has recently flared up again. ... For the last 15 years, the Democratic Republic of the Congo has been a major source of natural resources for the mobile phone industry."[86] The company Fairphone has worked to develop a mobile phone that does not contain conflict minerals.

See also
  • Telecommunication portal
  • Internet portal
  • Cellular frequencies
  • Customer proprietary network information
  • Field telephone
  • List of countries by number of mobile phones in use
  • Mobile broadband
  • Mobile Internet device (MID)
  • Mobile phone accessories
  • Mobile phones on aircraft
  • Mobile phone use in schools
  • Mobile phone form factor
  • Optical head-mounted display
  • OpenBTS
  • Personal Handy-phone System
  • Prepaid mobile phone
  • Two-way radio
    • Professional mobile radio
  • Push-button telephone
  • Rechargeable battery
  • Smombie
  • Surveillance
  • Tethering
  • VoIP phone
References
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Further reading .mw-parser-output .refbegin{font-size:90%;margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{list-style-type:none;margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li,.mw-parser-output .refbegin-hanging-indents>dl>dd{margin-left:0;padding-left:3.2em;text-indent:-3.2em;list-style:none}.mw-parser-output .refbegin-100{font-size:100%}
  • Agar, Jon, Constant Touch: A Global History of the Mobile Phone, 2004 ISBN 1-84046-541-7
  • Ahonen, Tomi, m-Profits: Making Money with 3G Services, 2002, ISBN 0-470-84775-1
  • Ahonen, Kasper and Melkko, 3G Marketing 2004, ISBN 0-470-85100-7
  • Fessenden, R. A. (1908). "Wireless Telephony". Annual Report of the Board of Regents of the Smithsonian Institution: 161–196. Retrieved 7 August 2009. 
  • Glotz, Peter & Bertsch, Stefan, eds. Thumb Culture: The Meaning of Mobile Phones for Society, 2005
  • Goggin, Gerard, Global Mobile Media (New York: Routledge, 2011), p. 176. ISBN 978-0415469180
  • Jain, S. Lochlann. "Urban Errands: The Means of Mobility". Journal of Consumer Culture 2:3 (November 2002) 385–404. doi:10.1177/146954050200200305.
  • Katz, James E. & Aakhus, Mark, eds. Perpetual Contact: Mobile Communication, Private Talk, Public Performance, 2002
  • Kavoori, Anandam & Arceneaux, Noah, eds. The Cell Phone Reader: Essays in Social Transformation, 2006
  • Kennedy, Pagan. Who Made That Cellphone?, The New York Times, 15 March 2013, p. MM19
  • Kopomaa, Timo. The City in Your Pocket, Gaudeamus 2000
  • Levinson, Paul, Cellphone: The Story of the World's Most Mobile Medium, and How It Has Transformed Everything!, 2004 ISBN 1-4039-6041-0
  • Ling, Rich, The Mobile Connection: the Cell Phone's Impact on Society, 2004 ISBN 1-55860-936-9
  • Ling, Rich and Pedersen, Per, eds. Mobile Communications: Re-negotiation of the Social Sphere, 2005 ISBN 1-85233-931-4
  • Home page of Rich Ling
  • Nyíri, Kristóf, ed. Mobile Communication: Essays on Cognition and Community, 2003
  • Nyíri, Kristóf, ed. Mobile Learning: Essays on Philosophy, Psychology and Education, 2003
  • Nyíri, Kristóf, ed. Mobile Democracy: Essays on Society, Self and Politics, 2003
  • Nyíri, Kristóf, ed. A Sense of Place: The Global and the Local in Mobile Communication, 2005
  • Nyíri, Kristóf, ed. Mobile Understanding: The Epistemology of Ubiquitous Communication, 2006
  • Plant, Dr. Sadie, on the mobile – the effects of mobile telephones on social and individual life, 2001
  • Rheingold, Howard, Smart Mobs: The Next Social Revolution, 2002 ISBN 0-7382-0861-2
  • Singh, Rohit (April 2009). Mobile phones for development and profit: a win-win scenario (PDF). Overseas Development Institute. p. 2. 
External links Wikivoyage has a travel guide for Mobile telephones. Look up mobile phone in Wiktionary, the free dictionary.
  • Media related to Mobile phones at Wikimedia Commons
  • How Cell Phones Work at HowStuffWorks
  • "The Long Odyssey of the Cell Phone", 15 photos with captions from Time magazine
  • Cell Phone, the ring heard around the world—a video documentary by the Canadian Broadcasting Corporation
  • v
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Mobile phonesGeneral
  • Features
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Smartphones
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Environment
and health
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Law
  • Carrier IQ
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Networking
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Generations
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    • adoption
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  • v
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Cellular network standardsList of mobile phone generations0G radio telephones (1946)
  • MTS
  • IMTS
  • Altai
  • OLT
  • MTA - MTB - MTC - MTD
  • AMTS
  • Autotel (PALM)
  • ARP
  • B-Netz
  • AMR
1G (1979)AMPS family
  • AMPS - N-AMPS
  • TACS - ETACS
Other
  • NMT
  • C-450
  • Hicap
  • Mobitex
  • DataTAC
2G (1991)GSM/3GPP family
  • GSM
  • CSD - HSCSD
3GPP2 family
  • cdmaOne (IS-95)
AMPS family
  • D-AMPS (IS-54 and IS-136)
Other
  • CDPD
  • iDEN
  • PDC
  • PHS
2G transitional
(2.5G, 2.75G)GSM/3GPP family
  • GPRS
  • EDGE/EGPRS - Evolved EDGE
3GPP2 family
  • CDMA2000 1X (TIA/EIA/IS-2000)
  • CDMA2000 1X Advanced
Other
  • WiDEN
  • DECT
3G (2001)3GPP family
  • UMTS
    • UTRA-FDD / W-CDMA
      • FOMA
    • UTRA-TDD LCR / TD-SCDMA
    • UTRA-TDD HCR / TD-CDMA
3GPP2 family
  • CDMA2000 1xEV-DO Release 0 (TIA/IS-856)
3G transitional
(3.5G, 3.75G, 3.9G)3GPP family
  • HSPA
    • HSDPA
    • HSUPA
  • HSPA+
    • DC-HSDPA
  • LTE (E-UTRA)
3GPP2 family
  • CDMA2000 1xEV-DO Revision A (TIA/EIA/IS-856-A)
  • EV-DO Revision B (TIA/EIA/IS-856-B)
  • EV-DO Revision C
IEEE family
  • Mobile WiMAX
    • IEEE 802.16e
  • Flash-OFDM
  • iBurst (IEEE 802.20)
  • WiBro
ETSI family
  • HiperMAN
4G (2009)
IMT Advanced (2013)3GPP family
  • LTE Advanced (E-UTRA)
  • LTE Advanced Pro (4.5G Pro/pre-5G/4.9G)
IEEE family
  • WiMAX (IEEE 802.16m)
    • WiMax 2.1 (LTE-TDD / TD-LTE)
    • WiBro
5G (IMT-2020)
(Under development)LTE 5G-NR Related articles
  • Cellular networks
  • Mobile telephony
  • History
  • Comparison of standards
  • Channel access methods
    • FDMA
      • OFDMA
    • TDMA
      • STDMA
    • SSMA
      • CDMA
    • SDMA
  • Spectral efficiency comparison table
  • Frequency bands
    • GSM
    • UMTS
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    • LTE
    • 5G NR
  • Mobile broadband
  • NGMN Alliance
  • Push-to-talk
  • MIMO
  • VoLTE
  • Wi-Fi calling
  • v
  • t
  • e
TelephonyTypesfds There are lot of Pumas in the forest. But they are not willing to deal with people in society. They seem so sacred of humans.
  • Landline
  • Mobile phone
  • Satellite phone
  • Photophone Cite error: There are <ref> tags on this page without content in them (see the help page).
Connectivity
  • Cable protection system
  • Communications satellites
  • Fibre-optical
  • Free-space optical
  • ISDN
  • Mobile phone signal
  • POTS
  • PSTN
  • Submarine cables
  • VoIP
Calls
  • Missed call
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  • Nuisance call
  • Phone tag
Applications
  • Fax transmission
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  • Telephone newspapers
  • Théâtrophone
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  • v
  • t
  • e
TelecommunicationsHistory
  • Beacon
  • Broadcasting
  • Cable protection system
  • Cable TV
  • Communications satellite
  • Computer network
  • Drums
  • Electrical telegraph
  • Fax
  • Heliographs
  • Hydraulic telegraph
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  • Telecommunications history
  • Telautograph
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  • Teleprinter (teletype)
  • Telephone
  • The Telephone Cases
  • Television
  • Timeline of communication technology
  • Undersea telegraph line
  • Videoconferencing
  • Videophone
  • Videotelephony
  • Whistled language
Pioneers
  • Edwin Howard Armstrong
  • John Logie Baird
  • Paul Baran
  • Alexander Graham Bell
  • Tim Berners-Lee
  • Jagadish Chandra Bose
  • Vint Cerf
  • Claude Chappe
  • Donald Davies
  • Lee de Forest
  • Philo Farnsworth
  • Reginald Fessenden
  • Elisha Gray
  • Erna Schneider Hoover
  • Charles K. Kao
  • Hedy Lamarr
  • Innocenzo Manzetti
  • Guglielmo Marconi
  • Antonio Meucci
  • Radia Perlman
  • Alexander Stepanovich Popov
  • Johann Philipp Reis
  • Nikola Tesla
  • Camille Tissot
  • Alfred Vail
  • Charles Wheatstone
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  • Transmission
    media
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    Network topology
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    • Links
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    Networks
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    • GND: 4338635-0
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    Fire 7 Tablet with Alexa, 7" Display, 8 GB, Black - with Special Offers
    Fire 7 Tablet with Alexa, 7" Display, 8 GB, Black - with Special Offers
    The all-new Fire 7 tablet is the next generation of our best-selling Fire tablet ever - now thinner, lighter, with longer battery life and an improved 7" IPS display. Tiny price. Big fun. Fast and responsive The fast quad-core processor consists of four high-performance 1.3 GHz cores for quick app launches, smooth games and videos, and great overall performance. Plus, Fire 7 now offers dual-band Wi-Fi with support for more Wi-Fi networks and better network performance. Crisp and vivid 7” IPS display Fire 7 features a 1024 x 600 IPS display with 171 ppi for a bright display with vivid colors and whiter whites for a great viewing experience from all angles. Compared to the previous generation, Fire 7 features an improved display that provides higher contrast and sharper text. No more worrying about storage space Expand your tablet’s storage by up to 256 GB using a microSD card to keep your photos, movies, and compatible apps and games with you. Plus enjoy free unlimited cloud storage for all your Amazon content and photos taken with your Fire tablet. Power when you need it With up to 8 hours of mixed use battery life, Fire tablet gives you the flexibility to go wherever the day takes you. Capture life's moments Fire 7 features a 2 MP rear-facing camera for taking photos or recording 720p HD video. The front-facing VGA camera is perfect for Skype calls with friends and family. Stands up to everyday life Amazon engineers Fire tablets to hold up against everyday life. As measured in tumble tests, Fire 7 is more durable than the latest iPad and 2x more durable than iPad mini 4 (and costs a lot less too). Designed for Entertainment Read Choose from millions of Kindle eBook and magazine titles that you won't be able to find anywhere else. Over 1 million titles are priced at $2.99 or less. Or read as much as you want with a Kindle Unlimited subscription for just $9.99 a month. Connect with the largest online community of book lovers on Goodreads. Read comfortably at night with Blue Shade, an exclusive Fire OS feature that automatically adjusts and optimizes the backlight for a more comfortable nighttime reading experience. Watch Enjoy all your favorite movies and TV shows on Amazon Video, Netflix, HBO NOW, Sling TV, and more. Discover hundreds of thousands of TV episodes and movies, plus fling Amazon Video content to your TV using Second Screen. Enhance your video experience with features you only get from Amazon, including On Deck for watching videos anywhere, ASAP for fast video streaming, and X-Ray to go behind the scenes of your favorite movies and TV shows while you watch. Watch downloaded videos anywhere with a Prime membership, Netflix plan, or Showtime subscription —on a plane, on vacation, in the car, or wherever you don't have a wireless connection. Play Fire tablets feature instant access to over 600,000 of the most popular free and best-selling games, social media, premium TV and movie provider apps, and so much more. Choose from top titles including Candy Crush Saga, Township, Mobile Strike, and more. Listen With millions of songs from thousands of artists, the Amazon Digital Music Store brings all your favorite music to your fingertips. Music you buy on your Fire tablet is saved to Your Music Library for free, and you can play or download it anytime. Unlock more music with Amazon Music Unlimited, just $7.99 per month for Prime members ($9.99 per month for non-Prime members). Audible offers more than 180,000 titles in audiobooks, including best sellers, romances, thrillers, and much more. Meet Alexa Alexa on Fire tablets Alexa provides quick access to the entertainment you want, including music, games, audiobooks, and more. You can also ask Alexa questions, check your calendar, get news, find sports scores, and even control your smart home. All you have to do is press and ask. One press. Millions of possibilities. When connected to Wi-Fi simply press the home button for one second then ask. Alexa will respond to you and will even show visual responses to certain questions. Everyday made easier Alexa on Fire tablets helps make everyday easier. Just press and ask to set alarms and timers, check traffic, your calendar, to-do or shopping lists, and more. You can order millions of items with your voice, such as household and personal care products. Be entertained Whether you’re looking for your favorite playlist or need a quick joke, you can ask Alexa. Just press and ask for a song, artist or genre, and stream directly over Wi-Fi. Alexa also provides voice control for Amazon Music, Pandora, iHeartRadio, TuneIn, and more. Stay informed Now you can ask Alexa a question and get an immediate voice response. When you press and ask, Alexa can pull up your Flash Briefing, Wikipedia articles, news, sports scores, and more. Voice control your smart home Alexa works with devices such as lights, switches, thermostats, and more from SmartThings, Insteon, Nest, ecobee, and Wink. Switch on the lamp before getting out of bed, turn on the fan or change the temperature on your thermostat while reading in your favorite chair, or dim the lights from the couch to watch a movie—just press and ask. The best of Prime Try Prime free for a month If you haven't tried Amazon Prime in the past, we'll give you a 30-day free trial. Experience what millions of members already enjoy—unlimited streaming of thousands of hit movies and TV episodes, ad-free access to over a million songs, over a thousand Kindle books, and Free Two-Day Shipping on millions of items Unlimited reading on any device Prime Reading gives you unlimited access to over a thousand books, current magazines, comics, Kindle Singles, and more. With any device – including your phone, tablet, or Kindle – you can read however you want, whenever you want. Stream thousands of movies and TV episodes with Prime Video With Amazon Prime, members enjoy unlimited streaming of thousands of movies and TV episodes at no additional cost, including award-winning Amazon Original series Transparent, top HBO shows like True Blood, Girls, and Curb Your Enthusiasm. No Wi-Fi, no problem—Prime Video downloads Exclusive to Prime members, download thousands of Prime Video movies and TV episodes. Watch downloaded videos anywhere—on a plane, on vacation, in the car, or wherever you don't have a wireless connection. Prime Video offers offline viewing at no additional cost. Over 2 million songs free with Amazon Music Prime Music is a benefit of your Amazon Prime Membership, featuring a growing selection of 2 million songs, always ad-free and on-demand. Unlock more music with Amazon Music Unlimited, just $7.99 per month for Prime members. Add HBO, SHOWTIME and more to Prime With Amazon Channels, Prime members can also subscribe to over 100 premium and specialty channels like HBO and SHOWTIME to add and stream—no cable or satellite subscription necessary. Prime members can subscribe to any or all of these channels with a free trial.

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    $49.99



    iPhone X Screen Protector, Maxboost (Clear, 3 Packs) iPhone X Tempered Glass Screen Protectors [3D Touch] 0.25mm Screen Protector Glass for Apple iPhoneX 2017 work with most case 99% Touch Accurate
    iPhone X Screen Protector, Maxboost (Clear, 3 Packs) iPhone X Tempered Glass Screen Protectors [3D Touch] 0.25mm Screen Protector Glass for Apple iPhoneX 2017 work with most case 99% Touch Accurate
    Your iPhone X 2017 Frontline Protection - Maxboost Tempered Glass Screen Protector THIN IS IN World's thinnest (0.25mm) tempered glass screen protector for iPhone X (2017) is 100% touch accurate and compatible with 3D Touch. Protects your screen from scratches and can absorb impact. OPEN EDGE DESIGN The Maxboost Glass Screen Protector fully covers iPhone X's newest display, and is case-friendly due to the open edge design. Wear your favorite case and keep your screen protected at the same time! FINGERPRINT-LESS Coated with hydrophobic and oleophobic clear layers, the glass protects against sweat and oil residue from fingerprints, keeping your phone screen pristine all day long. EASY TO INSTALL Includes worry-free installation frame to provide accurate installation. Also, online installation tutorials on how to correctly install your screen protector are available. Visit our website to learn more. LIFETIME WARRANTY No-hassle warranty provides easy lifetime protection for your tempered glass screen protector.

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    $9.99
    -$10.00(-50%)



    Mpow Flame Bluetooth Headphones Waterproof IPX7, Wireless Earbuds Sport, Richer Bass HiFi Stereo in-Ear Earphones w/Mic, Case, 7-9 Hrs Playback Noise Cancelling Headsets (Comfy & Fast Pairing)
    Mpow Flame Bluetooth Headphones Waterproof IPX7, Wireless Earbuds Sport, Richer Bass HiFi Stereo in-Ear Earphones w/Mic, Case, 7-9 Hrs Playback Noise Cancelling Headsets (Comfy & Fast Pairing)
    Bring Music Where You SweatThanks to the IPX7 sweatproof rating, Mpow sports earbuds keeps the headphones protected and in peak condition whether you’re getting drenched in sweat after a grueling workout.True High Definition SoundDrawing on extensive research and development, Mpow headphones features stereo sound with high definition and unparalleled rock-solid bass. Let your favorite songs drive you forward. Always Stay ComfortableErgonomic and shallow in-ear design, soft silicone ear hooks, and memory foam ear tips brings secure fit without hurting your ear, enables comfortable wearing experience.Portable Gym-ready Carrying Pouch & Cord clip Come with an EVA bag with cushioned interior which allows you to store your earbuds safely and prevent the scratches in your training routine. The cord clip can shorten the wire to fit your back neck or head, because the long wire may bother your move and cause stethoscope effect.*Note:(1) Please keep your headphone charged when in low battery life to achieve better Bluetooth connection and protect your battery.(2) Please choose suitable ear tips and wear your headphone tightly when you are running or cycling, it will help you reduce the annoying wind noise.(3) Covering the excess thread with the shirt will avoid cables bouncing of the neck during intense running.*Accessories' use:(1) You can tighten the earphone cable buckle to avoiding extra thread from bouncing around.(2) You will experience more comfortable by pinching the earplugs and lifting the ears up before wearing memory-foam ear tips.WarrantyEvery Mpow product includes a 45 days money back & 18-month warranty.Specifications:Bluetooth Standard: V4.1Wireless Profile: Headset, Handsfree, A2DP, AVRCPOperating Range: 10m (33ft)Standby Time: 220hrsCharging Time: 1.5hrsTalk /Playing Time: 7hrsCharging Voltage: DC 5VBattery Capacity: 100mAh/3.7VPackage Contents:Mpow Earphone x 1Regular Ear Tips(S, M, L) x 3 PairsMemory Foam Ear Tips x 1 Pair Cord clip x 1EVA Carrying Case x 1Charging Cable x 1

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    $19.99
    -$16.00(-44%)


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