I when I try to like call voicemail or try to make a call the screen goes black and I have to hit the center button at bottom to remove it and lock screen I think pops up then clear that to get to the proper screen and have to turn on the sound icon to hear sound etc very irritating. now getting weird things like found my phone with airplane mode on and I did not turn it on to when trying to listen to messages left on voicemail the phone turns off! tried factory resetting and that did not fix it. now this shutting off while trying to listen to a message on voicemail. also calls or messages come in and not even a chirp comes out of the phone! the touch or lockup occurs periodically also that has not gone away either. so irritating can not trust the phone anymore had important messages and could not listne to them because phone shuts off. so seems ot me getting worse and worse ....