ATI
AT+CIMI
AT+QCCID
AT+CGSN
AT+CFUN?
AT+CPIN?
AT+CSQ
AT+CREG?
AT+CIREG?
AT+CGREG?
AT+COPS?
AT+QENG="SERVINGCELL"
AT+QMBNCFG="List"
AT+CGDCONT?
AT+QICSGP=1
AT+CGPADDR
AT+QCFG="USBNET"
AT+QCFG="nwscanmode"
AT+QCFG="nwscanmodeex"
AT+QCFG="band"
AT+CEER