手机（mobile telephone，mobile phone，cell phone，或 cellular telephone）， abbreviated to "mobi"（in British English），"mote" or "mo"（in American English）， is an equipment for sending voice or data that access a cell of a mobile telecom station. A cellphone includes three main components， a transmitter， a receiver and a control circuit. A cellphone is a radio transceiver， operating within the context of the networks that allow communication between similarly enabled handsets.
A cellphone generally has the capability to make and receive telephone calls over a wide geographical area. It can send and receive text messages (SMS). It also has personal digital assistant (PDA) functionality. It can include a appointment calendar (an electronic version of a personal organizer)， a calculator， an alarm clock and an games. The mobile phone allows you to access the Internet as well as store contacts. It has the ability to take and show photographs， record video clips AND PLAY MUSIC. Newer mobile phones have a built in digital camera. Cellphone can connect to other electronic devices with Bluetooth and infrared technologies and have built in GPS receptor. In recent years， new applications have been added to cellphones， allowing them to do many of the things that desktop computers do， such as broadband Internet access， gaming， video conferencing and streaming video.
