Install Android 5.1.1 CM 12.1 Nightly Custom ROM on Xperia Z Ultra

Team CyanogenMod is always there to bring latest Android versions for both flagship and non-flagship devices. They are one of the biggest reason why the Android community is still so active, most of the other ROMs are based on these sources. Team CM has always played the Premier Role in releasing the ROMs based on Latest Android version, doesn’t matter what device it is. Now they have a surprise for another device owners, the Xperia Z Ultra, who quite stopped and might still be waiting for the Android 5.0 Lollipop update is now being updated to Android 5.1.1 via CM 12.1.

CyanogenMod ROMs are based on Pure Android and AOSP sources and has nothing extra in it, not even the Google apps, like most of the AOSP ROMs, you have to install Gapps separately on it. No Bloats are there to drain the battery or to make the device slow, this is just speed and performance.In this article, we will show you How to Install Android 5.1.1 CM 12.1 Nightly Custom ROM on Xperia Z UltraIf you are interested in Other ROMs, you can Visit our Custom ROMs section or you can install this ROM on your Xperia Z Ultra by following our tutorial below. This is not an official release from Sony but a Custom ROM. Installation procedure uses the Fastboot commands to install this custom ROM. Your device must be rooted. Let’s go through the early preparations and then flash this ROM.

Install Android 5.1.1 CM 12.1 Nightly Custom ROM on Xperia Z Ultra

Early Preparations:

  • This is only for Xperia Z Ultra!
  • Battery should be charged at least over 60%
  • Unlock Bootloader Of Your Device.
  • Flash a Custom Recovery and Root Your device
  • Backup SMS Messages
  • Backup Call Logs
  • Backup Contacts
  • Backup Media – Copy your files manually to your PC or Laptop.
  • Titanium Backup – If already rooted, use Titanium Backup to backup all of your apps, system data and other important content.
  • Backup Nandroid –  If CWM  or TWRP installed previously, otherwise skip this step and perform this at the end of flashing


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.

Downloads Required:

CM 12.1 Nightly: Link

Gapps: Link | Mirror

How to Install CM 12.1 Nightly:

  • Connect your device with PC.
  • Copy and Paste the Above zip files to the root of your sdcard.
  • Open Recovery mode. How?
  1. Connect your device with PC
  2. Open Command Prompt in Fastboot folder.
  3. Now Type: adb reboot bootloader
  4. Choose Recovery from Bootloader

CWM/PhilZ Touch Recovery:

  1. Back-up your ROM using the Recovery.
  2. To Perform a Back-up, Navigate to Back-up and Restore on Next screen, Choose Back-up again.
  3. Go back to Main Screen after the Back-up is complete.
  4. Then Navigate to ‘advance’ and choose ‘Dalvik Wipe Cache’, so you won’t get in any bootloop.
  5. Navigate to ‘Install zip from sd card’ another windows will open in front of you.
  6. Finally Select “Wipe Data/Factory Reset”
  7. Select ‘choose zip from sd card’ from the Options.
  8. Select the CM file and confirm the installation on next screen.
  9. Go Back and Flash
  10. Once the Installation is Over, Select +++++Go Back+++++
  11. Select Reboot Now to Reboot the System.

TWRP Users.

  1. Tap On Back-Up and Select System and Data
  2. Swipe the Confirmation Slider
  3. Tap on Wipe Button and Select Cache, System, Data.
  4. Swipe the Confirmation Slider.
  5. Go back to Main Menu and Tap Install Button.
  6. Locate the CM, and Swipe the Slider To install it.
  7. Once the Installation is Over, you will be promoted to Reboot System Now
  8. Select Reboot Now to Reboot the System.

The First boot might take up-to 5 minutes, so please be patient.

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