Related topics: smartphone · mobile devices

The brains of birds synchronize when they sing duets

When a male or female white-browed sparrow-weaver begins its song, its partner joins in at a certain time. They duet with each other by singing in turn and precisely in tune. A team led by researchers from the Max Planck ...

Beekee box: A network without the internet or electricity

How can you send documents, watch educational videos or work collaboratively in regions where there is no internet coverage or electricity? These were the challenging questions taken up by researchers at the University of ...

A platform for Africa's mobile innovators

Sam Gikandi '05 SM '06 and Eston Kimani '05 have always believed in the potential of Africa's entrepreneurial community. Their years at MIT, beginning in 2001 when they left their home country of Kenya, only reinforced that ...

China telecom giant Huawei hints US pressure hurting sales

Chinese tech giant Huawei said Tuesday it would have become the world's number one smartphone maker by year's end if it were not for "unexpected" circumstances—a hint that pressure from the U.S. may be hurting its sales.

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Mobile phone

A mobile phone or mobile (also called cellphone and handphone, as well as cell phone, wireless phone, cellular phone, cell, cellular telephone, mobile telephone or cell telephone) is a long-range, electronic device used for mobile voice or data communication over a network of specialized base stations known as cell sites. In addition to the standard voice function of a mobile phone, telephone, current mobile phones may support many additional services, and accessories, such as SMS for text messaging, email, packet switching for access to the Internet, gaming, Bluetooth, infrared, camera with video recorder and MMS for sending and receiving photos and video, MP3 player, radio and GPS. Most current mobile phones connect to a cellular network consisting of switching points and base stations (cell sites) owned by a mobile network operator (the exception is satellite phones, which are mobile but not cellular).

As opposed to a radio telephone, a mobile phone offers full duplex communication, automatised calling to and paging from a public switched telephone network (PSTN), handoff (am. English) or handover (European term) during a phone call when the user moves from one cell (base station coverage area) to another. A mobile phone offers wide area service, and should not be confused with a cordless telephone, which also is a wireless phone, but only offer telephony service within a limited range, e.g. within a home or an office, through a fixed line and a base station owned by the subscriber.

The International Telecommunication Union estimated that mobile cellular subscriptions worldwide would reach approximately 4.1 billion by the end of 2008. Mobile phones have gained increased importance in the sector of Information and communication technologies for development in the 2000s and have effectively started to reach the bottom of the economic pyramid.

This text uses material from Wikipedia, licensed under CC BY-SA