Hey when I first bought my Thunderbolt I was in 4G connection at all times nearly, but today for some odd reason it has only been in 3G connection. I have tried hard resetting/ pulling the battery and also I have checked the settings to make sure they were correct. I have even put it in lte mode only and all I got was 1x bars. I guess I'm really curious as to why this has happened today.
Any answers are greatly appreciated,
Jimmy