Some good news here... 2 days without disconnections on 4G so far. Stable 75% signal strength all day long ...and nights of course:) what I've found is that router's signal strength rating is not...

@Bonn Hi and welcome, 4G download speed to me ...when 4G ability on router really works and shows 2 LED bars - 75% signal strength (via 5Ghz Wifi connection) using mobile phone reads 60+ Mbps...

@Creeper Thank you again, mine is dropping speed too low frequently on "3G only" mode, like every 2-3 minutes and lasts for 10-15 seconds. I believe it happens when reception drops from 100% to 0% -...

@Creeper Thanks Creeper for the explanation No I don't see any "errors", I don't even see any "3G" although that's what I use from yesterday on. I wonder why "4G Preferred" don't use 3G as "backup...

24 hours in "3G only" with frequent interruptions but no disconnection at all ! That's great after all... So (in my case) my guess is that "4G Preferred" selection does not work properly because it...

Some update here. Switched to 3G and connection lasted overnight without permanent interruption, so no need to manually reboot or restart the router as I have to do when on 4G. Also found that...