2006-07-04 13:46:54 · 5 answers · asked by ivonkcme2 1 in Consumer Electronics ➔ Cell Phones & Plans
To basically authorize yourself (your phone) on the network, and to properly track your calls in order to adequately have your calls billed.
A subscriber identity module (SIM) is a smart card which securely stores the key identifying a mobile phone service subscriber, as well as subscription information, preferences and text messages.
2006-07-04 13:51:23 · answer #1 · answered by les_w_s 2 · 0⤊ 0⤋
Subscriber
Identity
Module
Basically it's a SMART card used to identify your phone and account settings. It also stores information [phone numbers] and preferences/user settings from your phone.
SIM cards are used primarily with GSM cellular phones and Satellite receivers.
2006-07-04 16:37:19 · answer #2 · answered by Serious Business 4 · 0⤊ 0⤋
It is the portable memory. When you get another phone that is similar in model, you can just replace the sim card with the one from your old phone and you will not have to re-enter all your address book.
2006-07-04 13:51:00 · answer #3 · answered by cruiser_man 2 · 0⤊ 0⤋
just in case u want to change your phone...u won't need a new #
2006-07-04 14:17:58 · answer #4 · answered by Nikki 3 · 0⤊ 0⤋
it is just like hearth in human body
2006-07-13 00:54:33 · answer #5 · answered by Anonymous · 0⤊ 0⤋