I have problem with my original (Kickstarter) module with inserted SIM card. Module is not running program, after powering on it restarts to USB mode. Without SIM module runs fine (i can upload sketch, have serial communication).
SIM is OK, no PIN, it works fine in newer module (bought later).
Is there anything to test? What can I try?
I tried to re-flash firmware (one from Arduino IDE) and module behaves in the same way even without any program loaded in.
Thank you for help.