Noticed this while I was playing a game that requires you to move/shake the phone. Only happens when you shake the forward to back not side to side. Rep at vzw store did take another brand new x2 and it produced the same noise. I wonder if this is just a new design or what can it be? Anyone else experience this? Note audio quality hasnt really been affected I feel, just had a fluke once so far with the audio being tinny/rattling. But after a reboot that issue went away and hasn't come back since. dancedroid