I've been testing NB-IoT in Germany:
I am using the following procedure to connect to a cell:
AT+CEREG? returns 0,2 (2: searching)
It keeps searching, but does not connect to a cell. It worked once but after that I haven't got another connection.
IMSI can be read and the correct IMEI is set. It worked once before but only one time.
My questions are: Am I missing some crucial command? Does the APN have to be set only for connecting to a cell?
Thanks in advance for any help.