I'm using my Nexus 5X running Android 7.1.2 as a wifi access point for my computers. I'm subscribed to an unlimited 4G plan, no upper limits. I got the phone last Fall, which is also when I switched from a wired ADSL connection, and this has been a consistent problem.
The problem itself
Whenever I receive a phone call, the mobile signal downgrades from 4G to H and speeds drop significantly (as one would expect). This isn't a problem in itself; 4G is exclusively for mobile data. But after the call has ended, the phone can't reacquire 4G until I restart it or turn off tethering for a long time. Turning mobile data on/off to reacquire the connection does not work.
Obviously having to reboot the phone every time I receive a phone call is bad, so what can I do about it? I don't use my phone or Android a lot so I might just be missing something obvious here.
- Toggling airplane mode does not restore 4G
- Toggling mobile data does not restore 4G