I am using an Arduino UNO and a SIMCOM SIM900 GSM/GPRS Shield And my code works. However when I open the serial monitor I get this message: Serial Started. DB:NO RESP DB:NO RESP DB:NO RESP Trying to force the baud-rate to 9600 1200 2400 4800 9600 19200 38400 57600 115200 ERROR: SIM900…

Problems with SIM 900 and Arduino UNO; What SIM Card Should I Use? Plz Help!

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