What is a SIM card?

(4) On November 24, 2010 at 9:23 am Robbertpenny [0] said:

SIM or Subscriber Identity Module card is is a portable memory chip used in some models of cellular telephones.

Note: C.Hainsaw moved this to the answer of "What is a SIM card?"

(3) On April 7, 2010 at 7:44 am Bobmacans [0] said:

A SIM card is also known as a subscriber identity module, is a smart card that stores data for GSM cellular telephone subscribers. Such data includes user identity, location and phone number, network authorization data, personal security keys, contact lists and stored text messages. Security features include authentication and encryption to protect data and prevent eavesdropping.

(2) On April 25, 2009 at 1:24 am C.jay28 [0] said:

Can the basic simm card be reprogrammed after manufacture or does this have to be done prior to manufacture, also what are the limitations of simms in respect to processing information

(1) On March 8, 2008 at 12:08 pm Rajeshjyt [0] said:

can you explain how basically receiving and transmission of information takes place

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