I remember I had a similar problem: the cause was the SIM was PIN-protected. When I removed the PIN, everything went fine.
As I wrote on my review:
The Arduino APIs provided don’t manage the PIN code, so the PIN code needs to be removed before.
I remember I had a similar problem: the cause was the SIM was PIN-protected. When I removed the PIN, everything went fine.
As I wrote on my review:
The Arduino APIs provided don’t manage the PIN code, so the PIN code needs to be removed before.