For the past week now my phone has not gotten 4g at places it used to such as my house and the areas around there. Even when I got 4g back again, it only lasted a few seconds until it died back to 3g or even 1x. Data has been dying out constantly. Today I called tech support and did a factory reset, still the same with no lte. Was then told that it might be my sim card, so I went to a corporate store and got a new sim card. It took a while but eventually the phone jumped back into 4g. Thinking my problem was solved, I drove home only to find that 4g again dropped back to 3g and stayed that way. I live in Los Angelese County, is anyone else here experiencing the same problem? Or is it just my phone's radio and I need to replace the phone?