I do not know what has happeed but my phone seems to have forgotten that it had 4G. When I look at the system settings under Network type iy only shows 1x and 3G... I can get 3-5 bars of 3G just about any where and I used to have decent 4G coverage everywhere but for the last week at least it has been in 3G all the time. I have rebooted several times already with no changes.
Suggestions? Thanks