we have a RUT955 at a remote location that is often unable to connect to the mobile network. The events shown are
>656 2022-09-07 02:15:11 Mobile Data Mobile data disconnected
>655 2022-09-06 02:16:26 Mobile Data Mobile data connected: N/A
>653 2022-09-06 02:15:09 Mobile Data Mobile data disconnected
>652 2022-09-05 02:16:26 Mobile Data Mobile data connected: N/A
>651 2022-09-05 02:15:08 Mobile Data Mobile data disconnected
>650 2022-09-04 02:16:25 Mobile Data Mobile data connected: N/A
>649 2022-09-04 02:15:09 Mobile Data Mobile data disconnected
Then every other day (after daily reboot) the device is able to connect to a "real" provider.
Adding a modem reset via ping reboot did not help: The connection is reset every 15 minutes, but never succeeds (same "Mobile data connected: N/A" story as above) - until the daily reboot.
Doing a reboot instead of a modem reset is not really an option as we must not interrupt the LAN.
The connection is actually OK (when it works), even though RSRP is -118 (the other indicators are looking ok). It is a roamed connection by the way. Firmware version is 06.08.5.
Are there any options to fix this behaviour? I am thinking about setting the operator whitelist to the operator shown when the connection actually works, as well as setting the service mode to 2G+3G, but I need to be sure that the router will not be permanently locked down by this.
Regarding the usual firmware update recommendation: This can only be performed when someone is on-site, which will take some time, but maybe this is a known issue?