How does a SIM card interface with a mobile phone?

(1) On April 3, 2008 at 11:17 am Shiju daniel [2] said:

Sim card is nothing but a smart card, so it is following the smart card specification ISO 7816 and intoducing the protocol T= 0 to communicate with mobile equipment. it has one IO ,Vcc,Gnd,Clk,Rst . for geting more information search for ISO 7816 specification , SIm card and mobile is striclyy following these specification for its layer 1 and GSM standards for its layer 2 and aplication level

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