For setting the SIM Card like predefined memory:

AT+CPBS="SM" < CR>

TO FIND a PHONE NUMBER from the SIM CARD by inserting the NAME

AT+CPBF="FRA" < CR>// all the names in phone book that begin with FRA....

TO FIND a PHONE NUMBER from the SIM CARD by INDEX

AT+CPBR=x < CR>// x=index number

To WRITE on the SIM

AT+CPBW=, "012345",129, "Friend"< CR>// Saves the number 012345 of my Friend

AT+CPBW=INDEX, NUMBER, TYPE, NAME< CR>

INDEX can be assigned directly by the SIM CARD, leave empty

NUMBER phone number

TYPE national format (129) or international (145) with the character "+" (for example +39 for Italy)

NAME the name to which the phone number will be associated

TO CANCEL a number in the SIM CARD

AT+CPBW=x< CR>// x it is the index of the number to be canceled

The commands used are drawn from releasable detailed lists AT COMMAND from the Telit GM862 site
http://www.telit.co.it/modules.asp