[3G] AT commands

"AT+COPS?": Which ISP.
"AT+CGMM": Model name
"AT+CPIN=xxxx": Unlock PIN.


手機 AT 指令集
http://www.360doc.com/content/06/0727/10/10450_165786.shtml
Sierra 320U
Sierra 320U with Telstra
AT commands
手機 AT 指令集
List of AT commands