I've had my phone for a week now and noticed the clicking noise. It seems that the heat from the battery might be causing the cover to warp, as it did not allow the cover to sit firmly on the phone. Anyway, called VZ, they opened a ticket and instructed me to got to a VZ store, which I did...And sadly I was not completely satisfied with the method the tech used to fix the issue.
He did indeed see the gap between the phone and cover, but the clicking was not as pronounced as the phone had been on standby for awhile and was cold. So he goes in the back room and brings out this cruddy return phone, pulls the cover off of it, and snaps it to my phone. Problem resolved...not quite. Aside from the fact that the cover was all scuffed up, I still see a little gap, which tells me this might be an issue with the phone.
Anyway, going to give it another week, if the issue worsens, VZ had better be ready to send me a replacement.
Later guys and gals,
dvidalnj