I deployed cme of 14 users (12 7911 and 2 7914)After some months some of the phones got bad. I brought the bad phones back to my office from the site. I fixed some in my office and got a replacemnt for the ones I coudn't fix. I tested all of them in my office and they were able to register with callmanager 4.1 running in my office. I then took them to site and added the new ones. The challange now is that both the ones I fixed and the replaced ones could no longer register with the cme. I did a reset and they keep going back and forth upgradding and cisco logo page.