I am trying to update my Droid RAZR M to KitKat and it is failing to install OTA. The phone is unrooted, stock and it downloads the software update just fine, but when the phone restarts and shows the Android icon with a progress bar, it fails and the phone reboots saying "Update failed to install." Any ideas on what could be causing this? I have tried downloading the update 3 different times in case it could have been corrupted, but still no luck. Thanks in advance!