@afzal_m
We’ve booked some progress possibly.
Above sequence ends in a denied registration on the network.
however:
AT+CGREG?
+CREG:0,5 -> we’re on Roaming
AT+COPS?
+COPS:0,2,“20416"”,9 -> we are on T-Mobile network, and on the NBIOT band
Setting your APN:
AT+CGDCONT=1,“IP”,“oceanconnect.t-mobile.nl”
We receive IP adress.
From here, we cant send any data as sim7000E does not support CoAp.
So we need UDP direct to be supported 
FYI: the new Sim7020 will have CoAp support planned, available in May-June