Hello,
I’m looking for guidance on recovering a MAX BR1 5G where the router itself is still reachable, but the cellular modem appears to be stuck in a reboot loop.
We were having cellular coverage/connectivity issues and attempted to perform a cellular modem firmware update. During the firmware update process, the unit experienced an unexpected power interruption.
Since then, the router web interface remains accessible, but the cellular modem repeatedly initializes/resets and never comes online. When I attempt to check for cellular firmware updates again, the UI returns:
“Please try again later.”
Event logs look like this:
| May 12 06:18:45 | WAN: Cellular SIM A cannot connect, switching to SIM B |
|---|---|
| May 12 06:12:29 | WAN: Cellular SIM B cannot connect, switching to SIM A |
| May 12 06:06:28 | WAN: Cellular SIM A cannot connect, switching to SIM B |
| May 12 06:00:34 | WAN: Cellular SIM B cannot connect, switching to SIM A |
| May 12 05:54:29 | WAN: Cellular SIM A cannot connect, switching to SIM B |
| May 12 05:48:20 | WAN: Cellular SIM B cannot connect, switching to SIM A |
| May 12 05:42:06 | WAN: Cellular SIM A cannot connect, switching to SIM B |
| May 12 05:35:56 | WAN: Cellular SIM B cannot connect, switching to SIM A |
| May 12 05:30:04 | WAN: Cellular SIM A cannot connect, switching to SIM B |
| May 12 05:24:08 | WAN: Cellular SIM B cannot connect, switching to SIM A |
I even tried loading a new eSIM from a carrier we’ve never used before just to see if that made a difference which it did not.
Is there a known recovery process for a cellular modem that is reboot looping after an interrupted cellular firmware update?
I have a ticket open #26050311 for this but I was hoping maybe had something while I go through the usual 20 questions process of a support ticket over the span of several business days.