Mine is doing the same thing and It's frustrating. Tried everything mentioned and nothing fixes it. Emails to HTC have yet to be answered. Hate to say it but I should have gotten the galaxy S3, my friend has not had any problems worth her S3.:mad:
I finally received a reply from HTC regarding this and they stated that the update was made specifically for AT&T. I don't see the Evo LTE receiving this update any time soon. How can we get Sprint to demand they update our phone as well?