[517.55 15:09:56] open /dev/wwan0at0
[517.55 15:09:56] > AT
[517.56 15:09:56] < AT
[517.56 15:09:56] < OK
[520.56 15:09:59] > AT+CEREG?
[520.57 15:09:59] < AT+CEREG?
[520.57 15:09:59] < +CEREG: 0,2
[520.57 15:09:59] < 
[520.58 15:09:59] < OK
[523.57 15:10:02] > AT+CGREG?
[523.57 15:10:02] < AT+CGREG?
[523.58 15:10:02] < +CGREG: 0,2
[523.58 15:10:02] < 
[523.58 15:10:02] < OK
[526.57 15:10:05] > AT+CREG?
[526.58 15:10:05] < AT+CREG?
[526.58 15:10:05] < +CREG: 0,2
[526.59 15:10:05] < 
[526.59 15:10:05] < OK
[529.58 15:10:08] > AT+CGATT?
[529.59 15:10:08] < AT+CGATT?
[529.59 15:10:08] < +CGATT: 0
[529.60 15:10:08] < 
[529.60 15:10:08] < OK
[532.59 15:10:11] > AT+COPS?
[532.60 15:10:11] < AT+COPS?
[532.60 15:10:11] < +COPS: 0
[532.61 15:10:11] < 
[532.61 15:10:11] < OK
[535.60 15:10:14] > AT+CEER
[535.61 15:10:14] < AT+CEER
[535.61 15:10:14] < +CEER: No cause information available
[535.61 15:10:14] < 
[535.62 15:10:14] < OK
[540.61 15:10:19] closed /dev/wwan0at0