Well, all in all a very postive review besides signal issues, but if you add all his negatives up, it sort of makes sense. He said that 1 bar in his area is pretty common, so due to his not so great coverage in his area you obviously will have: 1. Garbled/unclear voice calls, 2. the phone hunting back and forth between 3g and 4g, 3. Battery dying quickly when used as a hotspot (since the signal is bad).
Until I hear from lots of reviewers that, no matter where they live or especially if they live in a good Sprint area, that this phone performs subpar when it comes to signal strenght, I am not too worried. Reviews of the Sensation usually praised it's ability to grab more bars than other T-Mobile phones, I don't see how HTC all of a sudden lost it's ability to make good radios.
Hopefully we'll find more reviews shortly. The phones are out there apparently, here's hoping for the review floodgates to open, starting tomorrow!