How To Update Xperia Z Ultra To Android 4.4.2 KitKat via CM11 FXP

You can now update for the Sony Xperia Z Ultra latest and customized Android 4.4.2 KitKat. Google recently introduced the Android 4.4.2 Nexus KitKat many models but builds are not many customizable. FXP (Free Xperia Project) team recently introduced based CM11 Android 4.4.2 build for the Sony Xperia KitKat Z Ultra. You can download and install a custom firmware on your Sony Xperia CM11 Z Ultra. Since, the Sony Xperia Z Ultra quite able to run Android 4.4.2 KitKat smoothly, continue reading this guide to find out how to install Android 4.4.2 custom ROM CM11 KitKat based on Sony Xperia Z Ultra.
This tutorial is only for Sony Xperia Z Ultra. Don’t try this guide on any other Android device. Also, we are not responsible for any damage caused due to the instruction given in this page. Try this at your own risk. However, it is very unlikely that your device will be damaged if you follow all the instructions as it is which are mentioned in procedure.
Pre Requisites:

1. Backup your device data. You can follow our ultimate backup guide.

2. Make sure your device have at least 60% battery power. You can install an app like Battery Notifier BT Free on your Android device to check it easily.

3. You already have USB Driver Installed for Sony Xperia Z Ultra in your PC. Download USB Drivers

4. Make sure USB Debugging is enabled otherwise you won’t able to transfer file between PC and Sony Xperia Z Ultra.

5. Your device have latest CWM version and up or TWRP and up installed.

If you done everything that we mentioned above then you are ready to follow step-by-step guide on how to install Android 4.4.2 KitKat based CM11 ROM on Sony Xperia Z Ultra.

File Required(Download by clicking on it)
CM11 For Sony Xperia Z Ultra [Filename:]
Google Apps [Filename:]

How to Install Android 4.4.2 KitKat based CM11 ROM on Sony Xperia Z Ultra
  1. Connect your device to PC using USB cable and then copy downloaded files to the SD card of your device.Important: Don’t extract any files.
  2. Disconnect USB and then turn off your Sony Xperia Z Ultra.
  3. Now, boot into recovery mode. To do so, reboot phone and press Volume Up button few times while booting. [in recovery use volume buttons to scroll and Power button to select].
  4. Perform a Nandroid backup of your existing ROM that you can restore later if this new ROM not work or you want to go back into your previous ROM. To perform a backup, select Backup and Restore, then on the next screen, select Backup again. Go back to main recovery menu after backup is complete.
  5. Now, perform data wiping task. To do so, select wipe data/factory reset, then select Yes on next screen to confirm your action. Wait few minutes till the data wipe is complete. Now come back to CWM recovery main menu. Select wipe cache partition and after wiping process done, select Wipe Dalvik Cache under advanceoption to perform Dalvik cache wiping.
  6. Select install zip from sdcard, then select choose zip from sdcard. Now, locate the CM11 Zip file that you copied earlier in Step 1 and select it by pressing Power button. Confirm installation by selecting Yes – Install on the next screen. The ROM installation will begin.
  7. Once the ROM installation process end, repeat the step 6 but choose the file instead of ROM zip to install the Google apps package.
  8. When installation is completed, go back to the main recovery menu and select reboot system now to reboot your Sony Xperia Z Ultra and boot up into Android 4.4.2 KitKat ROM CM11. 
  9. Returning to Previous ROM: To go back to your previous ROM, boot into recovery, select backup and restore then restore your previous ROM by selecting it from the list.
Congrats! Android 4.4.2 KitKat firmware based custom ROM CM11 is now installed and running on your Sony Xperia Z Ultra. 
[Note: Root is turned off by default in CM ROMs, you must enable developer settings first (tap the build number 8 times under about device), then enable root under Developer Settings].