My router resets were terrible when I first got the Pro II router.
I had resets all the time and looking in the logs I saw 'system self' as the reason. I was told power issues could be the issue and all sorts of other issues that didn't transpire to be the answer. Here is what I did to get my router to now only reset every 10ish days;
Completed a firmware update via the router menu. There was one available when I clicked to check and as it was fresh out of the box running for 1 day, I expected there may be a router upgrade available.
If you have the 4G backup dongle plugged in via usbc, I shifted this to USBA->C, that lowered the resets. If I leave the dongle on usbc, within a few days the router resets and even though there is a white light on the dongle, its not registered as active on the router menu.
I then did a complete reset of the router, I disconnected it from the ONT, followed the setup via the Vodafone Broadband app (by the way the app never worked until I reset the router and started it all again). It somehow needed bluetooth pairing and this worked on the first complete reset I did (bearing in mind I simply got this router, connected it up and plugged it all in without the app and it just worked by connecting to the VF service and never used the Broadband app).
The router reset and pairing to the Vodafone Broadband app then worked and router was more stable.
I've no idea what profile or config these routers get when connecting to the service for the first time but a few calls to broadband support in the first few days required me to tell them my router serial number to 'configure' things.
I've run an ISP and it was never this bad activating a costly pro fibre service and expecting stability.
