has anyone had their speaker blow on this phone? my just started rattling this morning. kinda like it has a piece of something stuck in it. I tried blowing it out with one of those keyboard duster compressed air cans, and no luck. its really annoying when i talk to someone. they sound funny. I dunno if i should call htc, sprint, or bring it back to best buy. i know the people at best buy are tird of seeing me. I had two defective instinct hd's and a defective hero.