Hello,
I’m working with the Quectel EG915U modem and I have a question regarding network registration failure handling.
In some scenarios, the modem fails to obtain network registration (i.e., +CREG/+CEREG returns state 0 or 3 after a timeout period). In those cases, I’m considering implementing a recovery mechanism that power cycles the modem (hard reboot – full power off and power on) to try to force a fresh registration attempt.
My questions are:
Is performing a full power cycle of the modem an accepted/recommended recovery strategy when registration cannot be obtained, or can it cause any harm (e.g., to the SIM, internal flash, or modem firmware)?
Is it preferable to use software-based recovery commands instead (e.g., AT+CFUN=0/1 or AT+CFUN=1,1) rather than a hard power cycle?
Are there any recommended best practices or timing guidelines from Quectel regarding how long to wait before triggering such a recovery, and how many retries should be attempted before escalating to a reboot?
Could frequent reboots in areas with poor coverage potentially cause any issues such as SIM blocking or network-side penalties?
Any guidance or documentation references would be greatly appreciated.
Thank you!