Introduction - If you have any usage issues, please Google them yourself
Microcontroller development, for mobile phones AT instruction set and instructions, for example:
AT+ CMGL = 0 on the phone to read all SMS messages are not read
AT+ CMGL = 2 has been short listed in the information
AT+ CMGL = 4 read all SMS messages
AT+ CMGR = X Enter X SMS messages to read first
AT+ CMGF = 0 PDU format with carriage return
AT+ CMGD = X Enter X SMS messages deleted