Cannot send SMS with SIM900

Using Arduino Networking, Protocols, and Devices
3

Hi thanks for the answers i really have the same code and still the same problem (CME ERROR code 765 )

I tried with two SIM CARD in Switzerland.

I tried ao empty the sms stored in the SIM (mySerial.println("AT+CMGD=1,4"):wink:

I really block

Thanks for your help