AT+URAT=8

OK
AT+URAT?

+URAT: 8

OK
AT+CMEE=2

OK
AT+CGDCONT=1,“IP”,“dev.sodaq.com”

OK
AT+CGDCONT?

+CGDCONT: 1,“IP”,“dev.sodaq.com”,“0.0.0.0”,0,0,0,0

OK
AT+CFUN=1

OK
AT+COPS=1,2,“23201”

OK
AT+CSQ

+CSQ: 99,99

OK
AT+CREG=2

OK
AT+CREG?

+CREG: 2,2

OK
AT+CGPADDR

+CGPADDR: 1,0.0.0.0

OK
AT+USOCR=17

+CME ERROR: No connection to phone

AT+USOCR=17

+CME ERROR: No connection to phone

AT+USOST=0,“37.97.216.22”,3000,4,“Data”

+CME ERROR: Operation not allowed

AT+USOCL=0

+CME ERROR: Operation not allowed

at AT+USOCR=17 the errors begin.

Source: AT-Commands for NB-IoT – SARA – SODAQ Forum