At 08 Apr 2008 02:59:40 +0000 Larry wrote:

> Is only the number stored on this card??
>
> I don't think so.....but I could be wrong. I'm a CDMA customer, hard
> coded...


While GSM phones have serial numbers (IMEIs), GSM operators active the
SIM's serial number, which can be placed in any compatible device.

SIMs store the user's phone number, and can store a couple hundred contact
names/phone numbers (so you cantransfer your phone book from phone to phone
as well.)

To put it in AMPS terms, a SIM is essentially a removable NAM.