Install AOSP Android 5.0 Lollipop On Xperia Z Ultra


Sony’s only phablet, the Xperia Z Ultra will be one of the lucky devices to receive Android 5.0 Lollipop, but we are not sure when the update will roll out and hit the device. For the users who own this device, XDA recognized developer krabappel2548 has built an unofficial Android 5.0 Lollipop AOSP based custom ROM. This is a very early build and contains a lot of bugs, but most of the mainstream features are found to be working so it’s actually worth giving a try just to have a look, taste and feel of Android 5.0 Lollipop on your Xperia Z Ultra, before the official update arrives. We do not recommend the newbies to flash this ROM, those who have a good idea about flashing custom ROMs and actually know how to deal with em’, they may proceed without any hiccups here and there.

As you move forward in the proceeding guide, you will come across a complete and comprehensive method that will help you to install AOSP Android 5.0 Lollipop custom ROM on your Sony Xperia Z Ultra. Before you begin with the installation, you need to go through the early preparations carefully in order to avoid and mishaps.


Here’s what’s working and what’s not working in this ROM

– Bluetooth
– Wifi
– NFC??
– Texting
– Calling
– Mobile Data
– Sound
– Sensors
– Auto-Brightness
– Vibration
– Screen/Touch
– SELinux
– Recovery
– everything that’s not in the “not working list”

Not working:
– Camera
– Mobile Data?
– Mic on calling
– Video Playback (Use VLC or another app as workaround for now)


Early Preparations:

1. This is only for Sony Xperia Z Ultra!

This custom ROM is only for the device mentioned above. Make sure that your model number matches the one listed above. To do so, go to Settings > About Device on your device and see your model number. Flashing this ROM on any other device will result in bricking it so make sure that you meet this requirement first of all.

2. Battery should be charged at least over 60%.

Make sure that your battery is charged enough to complete the flashing process. In case your battery is low and your device goes dead during the flashing process, you may end up soft bricking your device as it won’t complete the flashing process.

3. Unlock Bootloader.

Your device’s bootloader must be unlocked in order to flash this custom ROM. You can unlock it by using our Sony bootloader unlock  guide.

5. Backup everything!

Just to be on the safe side, you may consider backing up each and everything from your Android device. This is highly recommended so that in case anything goes wrong, you still have the access to all of your data and you can restore it immediately. You may backup everything as listed below.

  1. Backup SMS Messages
  2. Backup Call Logs
  3. Backup Contacts
  4. Backup Media – Copy your files manually to your PC or Laptop.
  5. Titanium Backup – If already rooted, use Titanium Backup to backup all of your apps, system data and other important content.
  6. Backup Nandroid – If CWM  or TWRP installed previously, otherwise skip this step and perform this at the end of flashing.

6. Disclaimer

The methods involved in flashing custom recoveries, ROMs and rooting your phone are highly custom and may result in bricking your device, and has nothing to do with Google or the device manufacturer that is Sony in our case. Also rooting your device will void its warranty and you will be no longer eligible for any kind of free device services by the manufacturers/warranty providers. In case of any mishap we may not be held responsible. Follow these instructions to the letter to avoid any mishap or bricking. Make sure that whatever you do, you are doing it at your own responsibility.

How To Install Android 5.0 Lollipop On Xperia Z Ultra Using AOSP Custom ROM

  • Download the Xperia Z Ultra AOSP 5.0 Beta v3.0 file. (Android L > (togari) ZU > Beta 3 (right click beta 3 and download as zip))
  • Extract the file to get boot.img and system.img files.
  • Download Android ADB and Fastboot drivers, here’s our comprehensive guide for setting up ADB & Fastboot.
  • Open the extracted and copy all the .img files.
  • Now paste all the .img files file that you extracted from the zip folder in the minimal adb and fastboot folder that you got in the windows drive after installing the Minimal ADB and Fastboot drivers from the guide linked above.
  • Connect your Xperia Z Ultra in Fastboot mode with your PC now. To do so, turn it off completely, now connect it with your PC while keeping Volume Up key pressed. As soon as your PC has detected your phone in Fastboot mode, a blue light will blink up in the notification LED.
  • Assuming that you’ve already placed all the .img files in the fastboot folder, now open the Minimal ADB & Fastboot.exe from your desktop.
  • Once opened, issue the following commands.
  1. fastboot devices” – to verify if the device is properly connected in fastboot or not, once verified, proceed to next command.

  2. fastboot flash boot boot.img”

  3. “fastboot flash userdata userdata.img”

  4.  “fastboot flash system system.img”.


  • In case you are confused, follow the Android ADB & Fastboot drivers guide carefully.
  • Once all files are flashed, unplug your Xperia Z Ultra.
  • Reboot your device in recovery mode and wipe cache and dalvik cache.
  • Reboot your device now and checkout Android 5.0 Lollipop working on it.

How To Install Gapps Now

  1. Download file for Android 5.0 Lollipop.
  2. Copy the file to your phone’s SD card.
  3. Boot into recovery mode. To do so, reboot your device and quickly press Volume Up key simultaneously. You will see the recovery mode.
  4. In recovery, select “install zip > choose zip from SD card > select the file”.
  5. Flash the Gapps and reboot your device.
  6. You will have all Google Apps working fine on your phone now.

In case something goes wrong, you can either restore your Nandroid backup using the guide linked above or you may want to learn How To Download Sony Xperia Official Firmware And Create FTF File

That’s all with the ROM installation. In case you’re stuck with anything or you’re facing any issues, feel free to drop your words in the comment box below. We will get back to you as soon as possible.