EM7455 loosing LTE connection after some hours

HI folks, my module loose connection after 4-5 hours. I mounted in a usb enclosure and in a router with OpenWRT, in both cases I loose connection. I restore it with AT!RESET but is really frustrating.

Where can I start to look for to solve the problem?

You can monitor the registration status change by AT+CEREG=2 and AT+CGERE=2. The unsolicited notification may give you some clues.

AT+CGERE=2 gives error

Sorry missed a ā€˜Pā€™, please try AT+CGEREP=2. This gives packet domain events.