Hi, I did a search but didn't see this anywhere (??). Sometimes when I'm on the phone and I try to go back to hang up or look for something, the screen doesn't come back. When I go to press the lock button to unlock the screen, it doesn't work and I end up having to pull open the keyboard. The screen only comes back when I pull out the keyboard. This has happened a couple times and it's really frustrating when it does. Not sure if this has happened to anybody else, but it happens once in a while and it's REALLY frustrating!!