AT+CFUN=0 power off
AT+CFUN=1 power on
AT+CFUN=16 silent reset with reset of SIM card
AT+CMEE=2 enable verbose error reporting
AT+CREG=2 enable network and location status reporting
AT+UCFSCAN=7 LTE tower scan
AT+COPS=? check towers we can register to
AT+COPS=1,0,"AT&T" manually register with AT&T
AT+COPS=1,2,310410 manually register with MCC 310 MNC 410 (AT&T)
AT+CSQ signal strength
AT+CESQ signal strength
AT+CMGF=1 set PDU mode to text (for SMS)
AT+CMGS="+15551112222" send someone an sms (hit ctrl-z when done)
ATD+15551112222; dial a call
AT+CHUP hang up
AT+CEER get last error
AT+UCGED=2 enable network info
AT+UCGED? get network info
AT+CVMOD=3 prever VoLTE