I'm using my mudi v2 in an overseas trip. I need constant vpn connection to my server at home. I have already been using the setup for 2 weeks with no major issues (nothing that a reboot wouldn't fix).
Today the cellular connection suddenly dropped. The display showed "No service" while within the configuration portal it was saying "Connecting". I left it for a few minutes to see if it would fix on its own boy seeing that nothing changed, I decided to reboot from the web interface.
However while the connection (cellular + vpn) restablished, I noticed that the display would not show any mobile connection info (signal bars and carrier name). When I headed to the web interface, I noticed that it would not open (my browser would download a file with the filename 'download'). Since the connection was solid, I didn't bother and carried on.
A few hours later, I decided to power cycle the router. However, the behavior described above reproduced: no cellular info on display and no access to the web interface. SSH to the router still works and other than the fact I cannot access the web interface, everything works normally.
The problem, as you can imagine, is that I can't change any settings anyone. For instance I'm now in a hotel room and could connect to the hotel wifi as a repeater but cannot do it.
What troubleshooting steps I could take? Factory reset could be an option, but I would leave that as a last resort.