A SIM Card (Subscriber Identity Module) is required to enable the handset to work. It is similar to SMART cards used in various transactions in the commercial world. The SIM card provides security, containing all the necessary information/processes to validate each and every individual mobile user to the GSM Cellular mobile network.
A SIM Card (Subscriber Identity Module) is required to enable the handset to work. It is similar to SMART cards used in various transactions in the commercial world. The SIM card provides security, containing all the necessary information/processes to validate each and every individual mobile user to the GSM Cellular mobile network.
