Hi, I'am trying to work with the following shield: http://www.libelium.com/squidbee/index.php?title=New_GPRS_module_for_Arduino_%28Hilo_-_Sagem%29
It responds, but keeps telling me that no SIM card is inserted (+CME ERROR: 10) I also tried 2 more cards, but without success. Two days ago I saw the shield working at a friend of mine. Do you know about this error? Thanks for your help!