In the menu I mentioned above you can set 4g only.
I've been using it for ages since you don't need to have it in official settings app and it will...
Well, so where would I find official build for GM21AA if official site have not fixed that issue yet?
It should be visible in a hidden menu.
In dialer type *#*#4636#*#*
Phone Information > Set preferred network type
If I'm not mistaken, NR should be...
I have exactly the same issue, also new device.
Is there anything we can do to fix it?
Sometimes the screen feels good and sometimes it's tapping...