* [http://www.geekonfire.com/wiki/images/a/a8/SIM900_AT_Command_Manual_V1.03.pdf SIM900 AT Commands Manual v1.03.pdf]
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* [http://mchobby.be/data-files/gprsshield/SIM900_AT_Command_Manual_V1.03.pdf Manuel des commandes AT du SIM900] version 1.3 (miroir [http://www.geekonfire.com/wiki/images/a/a8/SIM900_AT_Command_Manual_V1.03.pdf chez GOF])