Root Nexus 4 on Android 4.3 JWR66V Jelly Bean Official OTA Firmware [Tutorial]
Root Nexus 4 on Android 4.3 JWR66V Jelly Bean official OTA firmware 

Google has rolled out its latest official Jelly Bean Over-The-Air (OTA) update, Android 4.3 JWR66V, for all Nexus devices at the recently held new Nexus 7 launch event in New York. The OTA update is now available for manual download and installation for Nexus 4, Nexus 7, Nexus 10 and Google Nexus I9250.

Nexus 4 users who have already updated their phone to the latest Jelly Bean official firmware can now root the same, using our step-by-step guide given below.

Key Points to Note

    • The JWR66V Jelly Bean firmware and these instructions are meant for the Google Nexus 4 model only. Do not attempt installing this firmware on another variant or device, as it may inadvertently hard-brick or damage the device. Verify the device model number by navigating to Settings > About Phone.
    • Back up data and settings via a recommended custom recovery tool such as ClockworkMod (CWM) or TWRP
    • Ensure USB debugging mode is enabled on phone by navigating to Settings > Developer Options (if device is running Android 4.0 or later) or Settings > Applications > Development (if device is running Android 2.3 or earlier). If device is running Android 4.2, perform the following steps:
    • Go to Settings > About Phone
    • Scroll to bottom of screen and select Build Number
    • Tap phone's Build Number seven times to unlock or reveal hidden developer options under Settings. Then select checkbox to enable USB debugging mode under Settings > Developer Options.
    • Ensure phone has at least 80% battery charge to prevent unexpected device shutdown (due to battery drain) while installing ROM.
    • Ensure both device and its bootloader is unlocked.
    • Instructions provided in this guide are meant for reference purpose only. IBTimes UK reminds readers it will not be held liable if device is damaged or bricked during or after firmware installation. Users are advised to proceed at their own risk.

How to Root Nexus 4 on Android 4.3 JWR66V Jelly Bean Official OTA Firmware

Step 1 - Download and Install Android SDK from the Android Developers website. Configure it with downloading platform-tools and USB drivers package via SDK.

Step 2 - Enable USB Debugging mode on Nexus 4 by navigating to Settings > Developer Options (if device is running Android 4.0 or later) or Settings > Applications > Development (if device is running Android 2.3 or earlier). If device is running Android 4.2, perform the following steps:

    • Go to Settings > About Phone
    • Scroll to bottom of screen and select Build Number
    • Tap phone's Build Number seven times to unlock or reveal hidden developer options under Settings. Then select checkbox to enable USB debugging mode under Settings > Developer Options.

Step 3 - Download Fastboot and extract it to android-sdk-windowsplatform-tools directory. Create a new directory if it is missing and then extract.

NOTE: Skip Steps 1, 2 and 3 if the required tools are pre-installed.

Step 4 - Download SuperSU v1.43 (UPDATE-SuperSU-v1.43.zip) for Nexus 4 on computer.

Step 5 - Connect and mount Nexus 4 USB mass storage on computer via USB cable.

Step 6 - Copy the UPDATE-SuperSU-v1.43.zip file to the root folder on your phone's SD card and Power off the Phone.

Step 8 - Download CWM 6.0.3.3 or TWRP 2.6.0.0 and save it to android-sdk-windowsplatform-tools directory on computer.

NOTE: Use one of the two custom recoveries: CWM or TWRP on a trial basis (if one fails then try the other)

Step 9 - Boot the phone into Fastboot/Bootloader Mode by pressing and holding Volume Down and Power buttons for a few seconds until some text appears on screen. This confirms entry into Bootloader Mode.

Step 10 - Browse to android-sdk-windowsplatform-tools directory and launch Command Prompt (hold Shift + Right-click > Open Command Prompt).

Step 11 - Type in the following command and press Enter.

fastboot flash recovery recovery-clockwork-touch-6.0.3.3-mako.img

Step 12 - Once the command is executed, select RECOVERY from the Fastboot menu and progress into Recovery Mode.

Step 13 - In ClockworkMod recovery, navigate to Flash Zip from SD card option and tap power button to select it.

Step 14 - Hit the Power button again and click Choose Zip from SD card.

Step 15 - Use volume keys to navigate to UPDATE-SuperSU-v1.43.zip and choose it by tapping Power button. Confirm the root installation on next screen and the installation process will begin.

Step 16 - Once the root installation is done, select "+++++Go Back" and reboot the phone by tapping Reboot System Now from the Recovery menu. The phone will now reboot and may take about five minutes for first boot to complete. So, please leave it alone.

Your Nexus 4 is now rooted on official Android 4.3 JWR66V Jelly Bean firmware. Check for the SuperSU app in your apps list to verify if root is successfully installed.

[Source: Team Android]