MKRNB 1500 fails to connect to LTE network

Hi,

I have spent days trying to debug the problem and I'm at my wit's end. I have bought a new board last week along with a prepaid SIM card. I have already set the RAT configuration to CAT M1 only.

TestModem works however when I tried TestGPRS or NBScanNetworks, the modem basically becomes unresponsive after a few commands as shown below:

22:59:38.695 -> NB IoT/LTE Cat M1 networks scanner
22:59:38.787 -> AT

22:59:38.787 -> OK
22:59:43.402 -> AT

22:59:43.402 -> OK
22:59:43.534 -> AT+CMEE=0

22:59:43.534 -> OK
22:59:43.734 -> AT+CFUN=0

22:59:43.734 -> OK
22:59:43.933 -> AT+CPIN?

22:59:43.933 -> ERROR
22:59:44.132 -> AT+CPIN?

22:59:44.132 -> ERROR
22:59:44.331 -> AT+CPIN?

22:59:44.331 -> +CPIN: READY
22:59:44.331 ->
22:59:44.331 -> OK
22:59:44.530 -> AT+CMGF=1

22:59:44.530 -> OK
22:59:44.729 -> AT+UDCONF=1,1

22:59:44.729 -> OK
22:59:44.928 -> AT+CTZU=1

22:59:44.928 -> OK
22:59:45.127 -> AT+CGDCONT=1,"IP",""

22:59:45.127 -> OK
22:59:45.326 -> AT+UAUTHREQ=1,0

22:59:45.326 -> OK
22:59:45.526 -> AT+CFUN=1

22:59:45.526 -> OK
22:59:45.728 -> AT+CEREG?

22:59:45.728 -> +CEREG: 0,0
22:59:45.728 ->
22:59:45.728 -> OK
22:59:45.927 -> AT+CEREG?

22:59:45.927 -> +CEREG: 0,2
22:59:45.927 ->
22:59:45.927 -> OK
22:59:46.126 -> AT+CEREG?

22:59:46.126 -> +CEREG: 0,2
22:59:46.126 ->
22:59:46.126 -> OK

Any advice will be greatly appreciated! :slight_smile: