Xperia Z Ultra
How to root Xperia Z Ultra on Android 5.0.2 Lollipop Sony

Xperia Z Ultra owners can now access root on their devices running stock Android 5.0.2 Lollipop build 14.5.A.0.242, which Sony rolled out recently, with due credit to renowned XDA developer Doomlord's infamous DooMKernel.

The kernel lets the device boot into TWRP recovery through which root file can be flashed on it. And to gain root you need Chainfire's SuperSU beta file.

This root method reported to be tested on stock Lollipop build 14.5.A.0.242 running Xperia Z Ultra model C6802. It could work on other Z Ultra variants as well, but not the Google Play Edition model.

Check out our following step-by-step guide to root Xperia Z Ultra.

Important points

  • As the tutorial is likely to wipe out all data of the phone, create a backup using custom recovery.
  • Ensure the battery level of your Xperia Z Ultra should be at least 80%.
  • Rooting the device will void the manufacturer's warranty. It will also trip the Knox warranty.
  • The SuperSU root file and kernel used in the guide works only with Xperia Z Ultra C6803 and these on any incorrect variant might brick the device. Check the model number of the phone by navigating to Settings>> About device>> Model number.
  • IBTimes UK will not be held liable for any damage to the device.

Download files

DooMKernel v22

SuperSU Beta v2.48

How to root Xperia Z Ultra on Android 5.0.2 build 14.5.A.0.242

Step 1: Transfer the SuperSU beta to your phone's storage and remember the location

Step 2: Download and install ADB on your Windows PC

Step 3: Download and install Sony Drivers

Step 4: Enable USB Debugging

  • Navigate to Settings>> About phone and tap build number seven times
  • Click on USB Debugging checkbox to enable it

Step 5: Connect your Z Ultra to the PC. Accept connection on your phone about the USB debugging when a pop-up appears

Step 6: Extract the DooMKernel v22 file to get a boot.img

Step 7: Go to the folder where you have saved boot.img

Step 8: Open a command window. Click anywhere on an empty space inside the folder then Shift + right click, then select Open Command Windows here from the drop down menu

Step 9: A CMD window will open up with destination set to the folder where you have the boot.img

Step 10: Enter fastboot mode on Z Ultra. While the phone is connected to the PC, type in the following command prompt and press Enter

  • adb reboot fastboot

Step 11: A blue LED light should appear on your Z Ultra. This is the fastboot mode

Step 12: Boot the phone into TWRP recovery by executing the following command

  • fastboot boot boot . img

Step 13: The fastboot will use boot.img from your PC folder to boot into recovery mode and open the TWRP recovery

Step 14: Create a backup in the recovery mode by clicking the Backup option

Step 15: Flash SuperSU beta file on your phone. Return to the main recovery menu and select Install, select SuperSU file and do a swipe on the Swipe to Confirm Flash option

Step 16: When the installation is completed, reboot the phone, Tap on Reboot>> System

Your Xperia Z Ultra should be rooted now with stock kernel and recovery in lieu of custom versions. Now you would be able to get OTA notifications.

[Source: AndroidSoul]