Much like the original poster, my screen begins to act up when making or receiving a call. It does go off when bring the phone to my ear, but when holding it parallel to the ground to hit buttons, say for voice mail or to end a call, the screen was beginning to blink on and off as if it knew when my finger was approaching the screen. Move a finger away, and the screen came back on. Try to touch the "end call" bar and it went black. I sort of dealt with this for a bit figuring I must have installed a patch that messed something up. I just used the physical keyboard to do voicemail commands. Today, the screen stayed black during the call and the only way I could end it was to pull the battery.
I checked the screen test today and it failed the proximity text. I've had this Pre 2 since September 2011 and it's been babied for the most part.
I do have some patches installed:
- Advanced System Behavior
- Advanced System Menus-Framework (ATT/VZW)
- Advanced System Menus-Today Menu (ATT/VZW)
- Advanced System Prefs-Calendar Prefs (ATT/VZW)
- Add Date MM DD
- Muffle System Logging
- Remove Tap Ripple
- Unthrottle Download Manager
- Reminder TImes Patch V2
Any advice would be helpful, even if someone flat out says "hardware issue".