@eric-barten Thank you for sharing these commands 
I would like to point out a minor change that would be required in the AT+COPS command for operator selection.
I think it should be:
AT+COPS=1,2,“20416”,8 instead of AT+COPS=1,2,“20416”,9
As ‘9’ is for CAT-NB1 and 8 is for CAT-M 