2007-01-07 04:48:32 · 2 answers · asked by sayed h 1 in Consumer Electronics ➔ Cell Phones & Plans
GSM is a complete standard for a mobile phone network. (www,3gpp.org). Originating in Europe, it is deployed in all countries in the world. In the USA and a few other countries a competing technology CDMA is also used.
A SIM card is the Subscriber Identity Module, It is a small chip that fits into a GSM phone. It the the SIM card that holds your subscription details and not the phone. If you put your SIM card in another phone, your number moves with it.
2007-01-07 06:15:10 · answer #1 · answered by amania_r 7 · 0⤊ 0⤋
GSM is bases on TDMA technology using a 200 kHz channel with eight time slots. GSM has integrated encryption which provides privacy and virtually eliminates fraud. GSM uses a subscriber identity module (SIM) card. A SIM card can store phones numbers in its own directory. This mean when you get a new phone, (the new phone must also use a SIM card) you don't have to program your stored numbers all over again.
2007-01-07 14:18:31 · answer #2 · answered by t2000 2 · 0⤊ 0⤋