Introduction to Mobile Terminals

A mobile communication device is a small, portable electronic device, with wireless communication capabilities, which is easy to carry around. A mobile phone, which is also known as mobile terminal (MT), cellular phone, cell phone, hand phone, or simply a phone, is a device that can send and receive telephone calls over a radio link while being connected to a cellular base station operated by a cellular network operator. A subscriber identification module (SIM) is an integrated circuit that securely stores the international mobile subscriber identity (IMSI) and the related key used to identify and authenticate subscribers on mobile telephony devices. Mobile terminal modem unit interfaces with the cellular base stations, and sends/receives user information generated by the application unit. So it interacts with a base station using different cellular air interface standards like GSM, WCDMA, LTE etc. to send/receive information to distantly located called party or server.