Must have an untouched system for the patch to work.If you don't have an untouched system but don't want to erase data follow these steps.Stock recovery flashes this, so no root needed.1.Reboot into bootloader2. Flash the stock system image from the moto x factory restore package(if you don't know what that is go to the development section and find it.The command to flash just the system image in Fastboot is : fastboot flash system system.img (if you place the system image in the same directory as your Fasboot and adb files.)3.Reboot into stock recovery find the zip file on your internal storage and flash, will take about a couple of minutes and your done.This updates, the kernel, baseband, and system files. I am quite sure the camera performance is increased in higher light situations and also noticed better focus.Credit to magui43212 who provided the file and link.This patches the root exploit by pwnmymoto. If you want to keep root and be locked, don't update.Sent from my XT1056 using Tapatalk 2