I've had my X for just a couple of days. Everything seemed to be working great until today. I was listening to Audible while cleaning my car. I always make sure the screen is turned off and I keep the phone in my back pocket. Twice, the book I was listening to suddenly paused for no apparent reason, and I'd have to unlock the screen, open Audible and press the play button. But what really got my attention was at one point I heard a beep and the phone ringing. When I pulled it out of my pocket, I realized my phone wasn't ringing, but it was making a call! I felt a little sheepish telling the person who answered (a car dealer) that my phone decided to make the call. How could this happen if the screen is turned off? Yesterday, I was also listening to Audible the same way for an extended period of time and had no problems. I had, however, made one change to the phone since yesterday, which could have affected something...? It had come with Advanced Task Killer already installed and was running by default. I then read (in this forum, I think) several posts advising against running these types of apps, so I killed it and uninstalled it. Could this have made a difference?