Mobile phone
Mobile phone
A mobile phone (pronounced /ˈmoʊbaɪl ˈfoʊn/), also known as a cell phone in North America, is a portable telecommunication device that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
Etymology
The term "mobile phone" is derived from the fact that these devices are portable and can be carried around. The term "cell phone" is derived from the cellular network structure used to provide coverage area.
History
The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing 2 kilograms (4.4 lb). In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone.
Technology
Modern mobile phones use a variety of technologies to facilitate their functions, including GSM, CDMA, and LTE. They also incorporate various features such as touchscreens, GPS navigation, Wi-Fi, and Bluetooth.
Health effects
There is some concern about potential health effects from mobile phone usage. The World Health Organization has classified mobile phone radiation as possibly carcinogenic to humans.
Related terms
- Smartphone: A mobile phone that combines a computer, a digital camera, and a cellular phone.
- Feature phone: A mobile phone that includes features such as the ability to access the Internet and store and play music but lacks the advanced functionality of a smartphone.
- Mobile app: A software application designed to run on a mobile device.
- Mobile network operator: A provider of wireless communications services.
External links
- Medical encyclopedia article on Mobile phone
- Wikipedia's article - Mobile phone
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