Hello,
during our tests, we remove the antenna from the device and put in a box, to simulate a connection issue. The connection is going down as expected, but when the modem is connected back to the antenna, we have an infinite loop.
The 2G, 3G & 4G LEDs turns on and off in a sequence one after the other for a while. From the wiki it means "the device is attempting to connect to a mobile network operator"
Then 2G, 3G & 4G LEDs blinking at the same time every 500 ms, that according to wiki is "No SIM card or incorrect PIN."
No way to get out of this loop, until we turn off and on the modem.
I attach the troubleshoot log.
Thanks, Enrico