Benefits of mobile phones

Advanced Mobile Phone Service (AMPS) is a standard system for Analog signal cellular telephone service in the United States and is also used in other countries. It is based on the initial electromagnetic radiation spectrum allocation for cellular service by the Federal Communications Commission (FCC) in 1970.

In the advanced mobile phone system (AMPS), the cellular system employed in the United States, different callers use separate frequency slots via FDMA . When one telephone call is completed, a network-managing computer at the cellular base station reassigns the released frequency slot to a new caller.

AMPS uses analog technology GSM uses digital technology AMPS has poor performance for data transfer Both systems use control channels to initiate calls. AMPS uses 21 control channels while GSM uses 3. AMPS is less secure than GSM GSM has the SIM smart card which holds the user’s personal information and phone settings.