Why does Sony Xperia One keep dropping LTE on Tmobile USA?

[Android Central Question]

I have an Xperia 1 on T-mobile in the Northeast US. Since early April I have had issues with the phone not staying on LTE + network or "dropping back" to Edge. This usually occurs moving from one area of the city or town or something as simple as walking indoors or outdoors. I usually have to either reboot phone or use Airplane mode to turn wireless off and on again. I have reset wireless settings, checked APN with carrier and have already factory reset phone. I got a new SIM from T-mobile and used the same SIM in another phone without issues. Phone hasn't ever been dropped or submerged and was working perfectly until about 2 months ago. I was thinking of upgrading to the MK 3 but if this is a Sony issue with firmware I'll probably hold off or consider different phone options. Anyone else have this issue? If so, any solutions or assistance would be appreciated. I love the phone and would hate to have to go back to Samsung or Oneplus because of something dumb.

 

[mustang7757]

What Android version it's running?
Have you tried safe mode?

I'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply

https://forums.androidcentral.com/showthread.php?t=409154

 

[B. Diddy]

Welcome to Android Central! It might also be a hardware issue, although I'm not sure how you could know for sure.