Mobile phone

"Cell Phone" redirects here. For the film, see Cell Phone (film).
"Handphone" redirects here. For the film, see Handphone (film).

Evolution of mobile phones, through early smartphone

A mobile phone is a telephone that can make and receive calls over a radio frequency carrier 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). Most modern mobile telephone services use a cellular network architecture, and therefore mobile telephones are often also called cellular telephones or cell phones. In addition to telephony, modern mobile phones support a variety of other services, such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming, and photography. Mobile phones which offer these and more general 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. 4.4 lbs (2 kg).[3] 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, penetrating 100% of the global population and reaching the bottom of the economic pyramid.[4] In 2014, the top mobile phone manufacturers were Samsung, Nokia, Apple, and LG.[5]

History

Martin Cooper of Motorola made the first publicized handheld mobile phone call on a prototype DynaTAC model on April 4, 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 "0G" (zeroth generation) 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 mobile cell phone was demonstrated by Motorola in 1973. 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.[6] 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 technology.

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.[7] 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.[8] 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.

Features

Main article: Mobile phone features
See also: Smartphone

All mobile phones have a variety of features in common, but manufacturers seek product differentiation by adding functions to attract consumers. This competition has led to great innovation in mobile phone development over the past 20 years.

The common components found on all phones are:

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 became known as smartphones.

Several phone series have been introduced to address specific market segments, such as the RIM BlackBerry focusing on enterprise/corporate customer email needs, the Sony-Ericsson 'Walkman' series of music/phones and 'Cyber-shot' series of camera/phones, the Nokia Nseries of multimedia phones, the Palm Pre, the HTC Dream and the Apple iPhone.

Sound quality

In sound quality, 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 with both, as this depends not so much on the phone itself, as on the quality of the network and, in long distance calls, the bottlenecks/choke points met along the way.[9][10] As such, for long-distance calls even features such as Voice over LTE and HD Voice may not improve things. In some cases smartphones can improve audio quality even on long-distance calls, by using a VoIP phone service, with someone else's WiFi/internet connection.[11]

Text messaging

Main article: SMS

The most commonly used 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, and subsequently many organizations provided "on-demand" and "instant" news services by SMS.

Multimedia Messaging Service (MMS) was introduced in 2001.

SIM card

Typical mobile phone 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.

Multi-card hybrid phones

A hybrid mobile phone can hold up to four SIM cards. 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 India and Indonesia and other emerging markets,[12] and this was attributed to the desire to obtain the lowest on-net calling rate. In Q3 2011, Nokia shipped 18 million of its low-cost dual SIM phone range in an attempt to make up for lost ground in the higher-end smartphone market.[13]

Kosher phones

There are Jewish orthodox 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]

Mobile phone operators

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

The world's largest individual mobile operator by number of subscribers is China Mobile, which has over 500 million mobile phone subscribers.[16] 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.[17] In 2014, there were more than seven billion mobile phone subscribers worldwide, a number that is expected to keep growing.

Manufacturers

Quantity Market Shares according to Gartner
(New Sales)
BRAND Percent
Samsung 2012
 
22.0%
Samsung 2013
 
24.6%
Nokia 2012
 
19.1%
Nokia 2013
 
13.9%
Apple 2012
 
7.5%
Apple 2013
 
8.3%
LG Electronics 2012
 
3.3%
LG Electronics 2013
 
3.8%
ZTE 2012
 
3.9%
ZTE 2013
 
3.3%
Others 2012
 
34.9%
Others 2013
 
34.0%
Note: "Others 2012" consists of Sony Ericsson, Motorola, ZTE, HTC and Huawei.(2009-2010)

Prior to 2010, Nokia was the market leader. However, since then competition has emerged in the Asia Pacific region, from brands such as Micromax, Nexian and i-Mobile, which have chipped away at Nokia's market share. Android-powered smartphones have also gained momentum across the region at the expense of Nokia. In India, Nokia's market share dropped significantly to around 31% from 56% in the same period. Its share was displaced by Chinese and Indian vendors of low-end mobile phones.[18]

In Q1 2012, according to Strategy Analytics, Samsung surpassed Nokia, selling 93.5 million units as against Nokia's 82.7 million units. In 2012 Standard & Poor's downgraded Nokia to "junk" status, at BB+/B, with negative outlook due to high loss and an expected further decline owing to insufficient growth in Lumia smartphone sales to offset a rapid decline in revenue from Symbian-based smartphones that was forecast for subsequent quarters.[19]

In Q3 2014, the top ten manufacturers were Samsung (20.6%), Nokia (9.5%), Apple Inc. (8.4%), LG (4.2%), Huawei (3.6%), TCL Communication (3.5), Xiaomi (3.5%), Lenovo (3.3%), ZTE (3.0%) and Micromax (2.2%).[20]

Top Five Worldwide Total Mobile Phone Vendors, 2013
Rank Manufacturer Gartner[21] IDC[22]
1 Samsung 24.6% 24.5%
2 Nokia 13.9% 13.8%
3 Apple Inc. 8.3% 8.4%
4 LG 3.8% 3.8%
5 ZTE 3.3% -
5 Huawei - 3.0%
Others 46.0% 46.4%
  • Note: Vendor shipments are branded shipments and exclude OEM sales for all vendors

Other manufacturers outside the top five include TCL Communication, Lenovo, Sony Mobile Communications, Motorola. Smaller current and past players include Karbonn Mobile, Audiovox (now UTStarcom), BenQ-Siemens, BlackBerry, Casio, CECT, Coolpad, Fujitsu, HTC, Just5, Intex, Kyocera, Lumigon, Micromax Mobile, Mitsubishi Electric, Modu, NEC, Neonode, Openmoko, Panasonic, Palm, Pantech Wireless Inc., Philips, Qualcomm Inc., Sagem, Sanyo, Sharp, Sierra Wireless, SK Teletech, Soutec, Trium, Toshiba, and Vidalco.

Use of mobile phones

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:

Smartphones

Active mobile broadband subscriptions per 100 inhabitants.[31]

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 only 20% of mobile telephony.

For distributing content

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.

In 2006, the total value of mobile-phone-paid media content exceeded Internet-paid media content and was worth US$31 billion.[32] The value of music on mobile phones was worth US$9.3 billion in 2007, and gaming was worth over US$5 billion in 2007.[33]

While driving

A sign along Bellaire Boulevard in Southside Place, Texas (Greater Houston) indicating restrictions on mobile phone use while driving.

Mobile phone use while driving is common but controversial. Being distracted while operating a motor vehicle has been shown to increase the risk of accidents; because of this, 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 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.

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 or satnav.

A 2010 study reviewed the incidence of mobile phone use while cycling and its effects on behaviour and safety.[34]

Mobile banking and payments

Mobile payment system
Main articles: Mobile banking and Mobile 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.[35]

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.[36]

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).[37] Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators and retail merchants.[38][39][40]

Tracking and privacy

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.[41][42]

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.[41]

China has proposed using this technology to track the commuting patterns of Beijing city residents.[43] In the UK and US, law enforcement and intelligence services use mobile phoness 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.[44][45]

Thefts

According to the Federal Communications Commission, one out of three robberies involve the theft of a cellular phone. Police data in San Francisco show that half of all robberies in 2012 were thefts of cellular phones. 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.[46]

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.[47]

Health effects

Further information: Mobile phones on aircraft

The effect of mobile phone radiation on human health is the subject of recent 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.

On 31 May 2011, the World Health Organization stated that mobile phone use may possibly represent a long-term health risk,[48][49] classifying mobile phone radiation as "possibly carcinogenic to humans" after a team of scientists reviewed studies on mobile phone safety.[50] The mobile phone is in category 2B, which ranks it alongside coffee and other possibly carcinogenic substances.[51][52]

Some recent 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".[53]

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)".[54] 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.[49][55] 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.[56] Certain countries, including France, have warned against the use of mobile phones by minors in particular, due to health risk uncertainties.[57]

Future evolution

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.

Deloitte is predicting a collapse in wireless performance to come as soon as 2016, as more devices using more and more services compete for limited bandwidth for their operation.[58]

Environmental impact

A mobile phone repair kiosk in Hong Kong

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.[59]

The average user replaces their mobile phone every 11 to 18 months,[60] 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.[61]

Conflict minerals

Demand for metals used in mobile phones and other electroncs fuelled the Second Congo War, which claimed almost 5.5 million lives.[62] 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."[63]

The company Fairphone has attempted to develop a mobile phone that does not contain conflict minerals.

See also

References

  1. John F. Mitchell Biography
  2. Who invented the cell phone?
  3. Heeks, Richard (2008). "Meet Marty Cooper – the inventor of the mobile phone". BBC 41 (6): 26–33. doi:10.1109/MC.2008.192.
  4. "Mobile penetration". 9 July 2010.
  5. Sara Nagi. "Top 10 Best-selling Mobile Phone Brands in the World 2014". TopTeny 2015.
  6. "Swedish National Museum of Science and Technology". Tekniskamuseet.se. Retrieved 29 July 2009.
  7. UMTS World. "History of UMTS and 3G development". Umtsworld.com. Retrieved 29 July 2009.
  8. Fahd Ahmad Saeed. "Capacity Limit Problem in 3G Networks". Purdue School of Engineering. Retrieved 23 April 2010.
  9. Jeff Hecht. "Why Mobile Voice Quality Still Stinks—and How to Fix It". ieee.org.
  10. Elena Malykhina. "Why Is Cell Phone Call Quality So Terrible?". scientificamerican.com.
  11. Alan Henry. "What's the Best Mobile VoIP App?". Lifehacker. Gawker Media.
  12. Archived 8 May 2011 at the Wayback Machine
  13. "Nokia boosted by sales of cheap handsets". 20 October 2011.
  14. "Kosher Phones For Britain's Orthodox Jews". Public Radio International.
  15. "Introducing: A 'Kosher Phone' Permitted on Shabbat". Arutz Sheva.
  16. Tania Branigan (11 January 2010). "State owned China Mobile is world's biggest mobile phone operator". Guardian News and Media Limited. Retrieved 17 December 2011.
  17. Source: wireless intelligence
  18. "Samsung May Have Just Become The King Of Mobile Handsets, While S&P Downgrades Nokia To Junk". Retrieved 28 April 2012.
  19. "Gartner Says Sales of Smartphones Grew 20 Percent in Third Quarter of 2014". Gartner.
  20. "Annual Smartphone Sales Surpassed Sales of Feature Phones for the First Time in 2013". Retrieved 13 February 2014.
  21. "Worldwide Smartphone Shipments Top One Billion Units for the First Time". Retrieved 27 January 2014.
  22. "UK | Millions keep secret mobile". BBC News. 16 October 2001. Retrieved 4 November 2009.
  23. Brooks, Richard (13 August 2007). "Donated cell phones help battered women | San Bernardino County | PE.com | Southern California News | News for Inland Southern California". The Press-Enterprise. Retrieved 4 November 2009.
  24. Goodyear, Dana (7 January 2009). "Letter from Japan: I ♥ Novels". The New Yorker. Retrieved 29 July 2009.
  25. "You Witness News". News.yahoo.com. 26 January 2009. Archived from the original on 22 May 2009. Retrieved 29 July 2009.
  26. Lynn, Jonathan. "Mobile phones help lift poor out of poverty: U.N. study". Reuters. Retrieved 2013-12-03.
  27. "4 Ways Smartphones Can Save Live TV". Tvgenius.net. Retrieved 4 June 2012.
  28. Donner, Jonathan, and Steenson, Molly Wright. "Beyond the Personal and Private: Modes of Mobile Phone Sharing in Urban India." In The Reconstruction of Space and Time: Mobile Communication Practices, edited by Scott Campbell and Rich Ling, 231–250. Piscataway, NJ: Transaction Publishers, 2008.
  29. Hahn, Hans and Kibora, Ludovic. "The Domestication of the Mobile Phone: Oral Society and New ICT in Burkina Faso". Journal of Modern African Studes 46 (2008): 87–109.
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  31. source Informa 2007
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  33. de Waard, D., Schepers, P., Ormel, W. and Brookhuis, K., 2010, Mobile phone use while cycling: Incidence and effects on behaviour and safety, Ergonomics, Vol 53, No. 1, January 2010, pp 30–42.
  34. "Branchless banking to start in Bali". The Jakarta Post. 13 April 2012. Retrieved 4 June 2012.
  35. ""Zidisha Set to "Expand" in Peer-to-Peer Microfinance", Microfinance Focus, Feb 2010". Microfinancefocus.com. 7 February 2010. Archived from the original on 21 September 2012. Retrieved 4 June 2012.
  36. Feig, Nancy (25 June 2007). "Mobile Payments: Look to Korea". banktech.com. Retrieved 29 January 2011.
  37. Poulter, Sean (27 January 2011). "End of the credit card? With one swipe of an iPhone you'll be able to pay for your shopping". London: dailymail.co.uk. Retrieved 29 January 2011.
  38. Ready, Sarah (10 November 2009). "NFC mobile phone set to explode". connectedplanetonline.com. Retrieved 29 January 2011.
  39. Tofel, Kevin C. (20 August 2010). "VISA Testing NFC Memory Cards for Wireless Payments". gigaom.com. Retrieved 21 January 2011.
  40. 1 2 "Tracking a suspect by mobile phone". BBC News. 3 August 2005. Retrieved 14 March 2009.
  41. Miller, Joshua (14 March 2009). "Cell Phone Tracking Can Locate Terrorists — But Only Where It's Legal". FOX News. Retrieved 4 February 2014.
  42. Cecilia Kang (3 March 2011). "China plans to track cellphone users, sparking human rights concerns". The Washington Post.
  43. McCullagh, Declan; Anne Broache (1 December 2006). "FBI taps cell phone mic as eavesdropping tool". CNet News. Retrieved 14 March 2009.
  44. Odell, Mark (1 August 2005). "Use of mobile helped police keep tabs on suspect". Financial Times. Retrieved 14 March 2009.
  45. Adams, Mike "Plea Urges Anti-Theft Phone Tech" San Francisco Examiner Friday, 7 June 2013 Page 5
  46. "Apple to add kill switches to help combat iPhone theft" by Jaxon Van Derbeken San Francisco Chronicle Tuesday, 11 June 2013 Page 1
  47. "IARC CLASSIFIES RADIOFREQUENCY ELECTROMAGNETIC FIELDS AS POSSIBLY CARCINOGENIC TO HUMANS" (PDF). World Health Organization.
  48. 1 2 "What are the health risks associated with mobile phones and their base stations?". Online Q&A. World Health Organization. 5 December 2005. Retrieved 19 January 2008.
  49. "WHO: Cell phone use can increase possible cancer risk". CNN. 31 May 2011. Retrieved 31 May 2011.
  50. "Agents Classified by the IARC Monographs, Volumes 1–107" (PDF). monographs.iarc.fr.
  51. Kovvali, Gopala (1 January 2011). "Cell phones are as carcinogenic as coffee". Journal of Carcinogenesis 10 (1): 18. doi:10.4103/1477-3163.83044.
  52. Khurana, VG; Teo C; Kundi M; Hardell L; Carlberg M (2009). "Cell phones and brain tumors: A review including the long term epidemiologic data". Surgical Neurology 72 (3): 205–214. doi:10.1016/j.surneu.2009.01.019. PMID 19328536.
  53. "World Health Organization: Cell Phones May Cause Cancer". Business Insider. Retrieved 31 May 2011.
  54. "Electromagnetic fields and public health: mobile telephones and their base stations". Fact sheet N°193. World Health Organization. June 2000. Retrieved 19 January 2008.
  55. Little MP, Rajaraman P, Curtis RE, et al. (2012). "Mobile phone use and glioma risk: comparison of epidemiological study results with incidence trends in the United States". BMJ 344: e1147. doi:10.1136/bmj.e1147.
  56. Brian Rohan (2 January 2008). "France warns against excessive mobile phone use". Reuters. Retrieved 10 May 2010.
  57. "Wireless performance will collapse, prices rise: Deloitte". theregister.co.uk.
  58. "The Secret Life Series - Environmental Impacts of Cell Phones". Inform, Inc. Retrieved 4 February 2014.
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  61. "Is your mobile phone helping fund war in Congo?". The Daily Telegraph. 27 September 2011.
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Further reading

  • 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

Look up mobile phone in Wiktionary, the free dictionary.
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