I try to connect as well but is failing and I don't understand what is going wong:
Arduino Leonardo board + SODAQ NBIoT shield + T-Mobile SIM card
I followed the Tutorial for sending manual AT commands.
This is my config on the board:
CDP IP address:
Forced network registration on T-Mobile:
But unfortunatelly AT+CGATT? => 0
SIM is active (checked with T-Mobile)
What am I doing wrong?