NO LTE connection
I had a very frustrated problem. I got a brand new HTC ONE from Sprint about two weeks ago. I live in a neighborhood with very strong LTE coverage, official launched area. I used an app to show the signal strength. If I restart my phone or toggle the flight mode, my phone will show 4G icon. However, whenever I tried to use LTE (such as run the speed test), the network will be switched back to EHRPD/Rev.A. I already updated my profile, PRL, and software many times. I began to realize that I may have a phone issue. Any suggestions?