Motorola Razr XT910 Coustum Rom V4.2.2 Firware Flash File

ROM Version: ROM Android 4.2.2 CM10.1

Install ROM :
Connect your smartphone to PC using USB cable.
Copy downloaded files to the SD card of your smartphone. Important: Don’t extract any files.
Disconnect USB and then turn off your smartphone.
Now boot into Safestrap recovery. To do so, first press power button to turn device on then after the Motorola SPlash screen, you should see the Safestrap screen. The Safestrap screen should show Safestrap Disabled in red, Recovery at the bottom left, and Continue at the bottom right. Tap on Recovery button on the Safestrap main screen to boot into Safestrap recovery mode.
Now it’s time to set up a ROM slot for CM10.1. To do so, tap on Boot Options and in the very next screen tap on ROM-Slot-1. Now set the data partition to a minimum of 1GB unless you planning to install tons of apps and games. The other two partitions – system and cache are default and cannot be changed. Wait for the partitions to get set up.
Once the process, completed, your ROM slot is ready. Which means it will boot from that new slot from now on. All we have to do now, install a ROM on that slot, which in our case is CM10.1.
Press the home button to return back to the main screen. Now tap on Install and navigate and select cm-10.1-20130316-NIGHTLY-umts_SPyder.zip. On the next screen, slide the button to confirm the installation.The Install ROM onation will begin.
Once the Install ROM onation process, end, repeat the step 7 but choose gapps-jb-20121212-signed.zip instead of ROM zip to install the Google apps package.
When installation is completed, go back to the main menu and select reboot system to reboot the smartphone and boot up into customized Android 4.2.2 Jelly Bean ROM CM10.1. The first boot will take time, so be patient!