If you have a copy of the original cp change the name of the file to the serial of your phone, download the update utility from moto for the i855, put the cp file in the backup folder of the update utility (after it has been installed), run the utility and put a check in the box to repair. You may have to boot the phone in flashtrap mode to make it be recongnized by the utility. This should repair your phone and update it also. If you do not have a back up of the original cp try using the update on it anyway without checking the box to repair.