Mobiles Theory

A mobile phone (also known as a handphone,[1] wireless phone, cell phone, cellular phone, cellular 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 of base stations (cell sites), which is in turn interconnected to the public switched telephone network (PSTN) (the exception is satellite phones).
A mobile phone proper typically has a telephone keypad, more advanced devices have a separate key for each letter. Some mobile phones have a touchscreen.
Contents[hide]
1 History
2 Handsets
2.1 Features
2.2 Applications
2.3 Media
2.4 Power supply
2.5 SIM card
3 Terminology
3.1 Related non-mobile-phone systems
4 Privacy
5 See also
6 References
7 Further reading
8 External links
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