I have an HTC Thunderbolt with Verizon service. Basically, it's a $400 alarm clock- worthless for anything else. Here are some of the issues I have with this piece of junk:
1.) Ever since the last software update my phone randomly re-starts itself. And when it does I get the same "activating phone/sim card" notification that's been affecting many.
2.) I work in San Marcos, Texas. I never have service at work, even though the coverage map says I should. But, all of my coworkers on AT&T have outstanding service....
3.) Again, since the last update more often than not, my phone refuses to hang up a call- the touch screen in unresponsive.
Bottom line, if you're looking for an expensive alarm-clock my phone is the way to go! If you're looking for an actual phone that you can use to check emails, etc look elsewhere!
End of rant.....