Ha, I have been using this same pre2 since 2011, I think. I have been meaning to switch to a new one mainly cause the camera stopped working. Now I have a new hardware problem: Opening/closing the slider seems to do something to the audio functionality. First I noticed that it would pause bluetooth, and lately it has started to switch the phone to headset mode.
I can bring it back to normal mode with the audio switch app, but it does not last. Just another example of hardware problem that can arise eventually