nwhitfield
Member

Registered: Feb 2000
Location: London, UK
Posts: 92 |
SIM = Subscriber Identity Module. In GSM, it's a small smart card that fits in a mobile phone. It will identify the phone to the network, and can also store some messages and phone numbers - usually at least 99 phone numbers and 10 messages.
You can move a SIM from one phone to another, thereby taking all your phone book entries and your own phone number to the new phone - it's one of the biggest pluses of the GSM system.
A pre-paid SIM is simply a SIM for a particular network for which a subscription has been paid up front - that might be for a year, or for longer.
Without knowing the country in which the original poster is resident, it's hard to give an answer to the question.
Nigel.
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