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Wiki User
Answered 2013-06-19 06:20:50
A SIM card is a small electronic circuit installed in a mobile phone or other device, that identifies the device to the network it's using. A comprehensive explanation (along with examples of the different sizes) can be seen in the related link to Wikipedia.
Wiki User
Answered 2011-07-05 14:30:34
a sim card is a part of a celphone so a phone can read things
A sim card is a card which is inserted into your cell phone. It functions as a memory card of sorts, and holds information for your phone, to determine what network it belongs to (Sprint, TMobile, AT&T, etc). It will also store some other information, such as phone book contacts.
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