I finally got my ROG Phone 8 back from its second repair. I noticed that it now shows full bars of 5G were it only has reception for a T-Mobile LTE CellSpot. I ran a signal checker and it indeed only has LTE 66 from the picocell. The SIM card network list also reports only 4G being available.
It used to honestly report what protocol it was on. US model on firmware 34.1420.1420.427)
(Originally posted to Reddit)
