This problem has been an issue for since the update a long time ago. I am finally really annoyed that I cannot figure it out. Whenever I call someone, the screen turns off. Ok, no big deal right? Then when I want to use the dial pad or end the call, I can't because the screen wont turn on. The power button does not do anything. I have to take the battery out so that whoever I call does not have a ridiculously long voice message or they hang up and the screen turns back on. I tried to find a way to make it work but nothing. I noticed that some of the features from the previous version are not in the current update like the pocket detection (which I had used). Anyone got any ideas? Thanks
You say that this started after the GB update? strange.
Have you tried running in SAFE MODE, just to rule out a 3rd party app causing the issue?
Have you tried Clearing your System CACHE?
Last resort, a Factory Reset - seems to be the silver bullet for some. This is what Verizon will likely do if you take it into the store or call support.
ALL 3 procedures have been well-documented here. Use SEARCH up above - give a shout out if you can't find the procedures.