I know how to make a voice call from this example http://www.seeedstudio.com/wiki/GPRS_Shield
and the command is
mySerial.println("ATD + +86138xxxxx615;");//dial the number delay(100); mySerial.println();
However, the number I want to call is return some text and I want to show return text in Terminal Monitor.
I try to learn AT command but don't understand how to use it. This is link for AT Command reference http://www.simcom.us/act_admin/supportfile/SIM900_ATC_V1.00.pdf or anyone can suggest me article to getting start with AT command.
Thank you very much.