I've been having a problem with the Pre's audio. This is not the same problem as the Bluetooth speaker issue, so please no "hit the search button" responses.

I can make and receive phone calls, with or without headphones, on speaker phone or using the earpiece, and I am completely unable to hear the person (or robot in the case of voicemail) on the other end.

Instead, all I hear is awful crackling static, regardless of how full of a signal I have.

The worst part of the problem is that the phone occasionally DOES work, it would appear only to do so when I am approaching the Sprint store. So I have thus far been unable to have the techs there replicate it...

Anybody have some suggestions? I'd love to hear some advice from someone more knowledgeable than I.