I've read about a possible grounding issue with the some screens, but I haven't read about the issue I'm having. Randomly the touchscreen will stop working... It doesn't matter what I have open it will just stop working. The system is still running, calendar alerts will pop up, and the time will still advance, but I can't do anything with the phone and have to pull the battery and force a reboot to get the screen to respond. I initially thought maybe it was an app, but this has happened with nothing running except the default apps. Has anyone had this issue? Should this phone be exchanged for a new one? (same phone) Thanks!