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Install Android 6.0.1 eXistenZ ROM on Xperia Z3 Marshmallow Firmware

eXistenZ ROM for Sony Xperia Z3 is based on the Latest Android 6.0.1 Marshmallow. This ROM is a Custom Build ROM based on the Official Sony Xperia X3 Marshmallow Firmware. So it is Highly Stable on Sony Xperia Z3 and you don't need to worried about bugs. Moreover, there are some great customization features on this ROM if you want to use according to your needs. If interested in Installing Official Android 6.0.1 Marshmallow on Xperia Z3, check out our Detailed Step-by-Step Guide on How to Update Xperia Z3 to Official Android 6.0.1 Marshmallow Firmware (All Model).

You can Update Sony Xperia Z3 to Android 6.0.1 eXistenZ ROM Marshmallow Firmware using this tutorial below. As this is not an Official Release by Sony, just a Custom ROM by Developers, so you need to install a Custom Recovery (like CWM) to install this ROM.

Xperia Z3

As you continue reading below, we will guide you how to install Android 6.0.1 eXistenZ ROM on Xperia Z3 (D6646)Xperia Z3 (D6603) and Xperia Z3 (D6653) using CWM. Don’t forget to backup all your apps and personal data as a precaution. Major revamps like these usually have a wipe script with them, meaning, after you finish the update process, your phone will be completely wiped. Now in order to avoid any problems we recommend backing up your data which might include documents, contacts, or even downloads. Let’s continue with the tutorial now.
NOTE: Make sure your Android device is charged up to 80-85% battery level. Why? Because, if your phone goes off suddenly while installing a custom ROM, flashing an official firmware update or installing mods etc. — your phone might get bricked or go dead permanently. No one wants that, right?
There are lots of useful articles and how-to guides on for the Sony Xperia Z3, but we think you might be interested in the following posts:
Disclaimer: Please read the following instructions thoroughly before attempting to flash your phone. absolves itself from any responsibility should something go wrong. Please proceed with caution and at your own risk.

Android 6.0.1 eXistenZ ROM Marshmallow Details:

This Amazing custom ROM comes with lots of new features and tweaks which are based on the latest Android 6.0.1 Marshmallow by Google. A quick list of some main features are given below, and we are sure you’d love to use this on your Xperia Z3:
  • Fully coded with Android 6.0.1 Marshmallow (API 23).
  • Based on the official Sony Marshmallow firmware.
  • Loads of great customization features.
  • Fast and smooth.
  • Stable as Stock.
Like this eXistenZ ROM based on the latest Android 6.0.1? We love it too and we know you are looking forward to install it on your phone now. Now please read every step carefully so that your installation goes smooth and you do not end up with any problems.

HOW TO: Install Android 6.0.1 eXistenZ ROM on Xperia Z3

We have put together a detailed step by step installation instruction so that the first time users doesn't face any problem. If you are used to installing custom ROMs with CWM recovery, then this should not be any different for you.

However for the first time users, you need to Unlock the bootloader of your Xperia Z3 and Install Custom Recovery like CWM. If you are unsure, please do that first and then come back to this tutorial. Make sure to read every step carefully so that your installation goes smooth without facing any problem. We recommend you to read this tutorial once before actually performing it on your device.

To Remember:
  • This tutorial is only for installing Android 6.0.1 eXistenZ ROM on Sony Xperia Z3. Please do not try on any other Xperia variants.
  • Your phone should be rooted and have ClockworkMod recovery installed from before.
  • This tutorial will wipe out all your data. Proceed at your own risk.
  • Perform a Dalvik Cache wipe before proceeding from the recovery mode.
  • Sony PC Companion will NOT detect your phone after installing this ROM because it is a custom firmware.
  • Bootloader should be unlocked, or you will not be able to install this ROM.
  • Make sure you backup all your data in your phone before proceeding.
Step 1: Download Android 6.0.1 eXistenZ ROM for Xperia Z3 to your computer and extract the boot.img file separately.

Step 2: Connect and mount your Sony Xperia Z3 USB memory to your computer using the USB cable.

Step 3: Now copy/paste the downloaded Android 6.0.1 eXistenZ ROM zip file to your phone memory/SD card. Make sure the files are in the phone memory/SD card root (not in any folder).

Step 4: Download and install the latest Android SDK to your computer from the table below. Make sure ADB and Fastboot is configured properly on your PC.

PlatformSDK tools packageSHA-1 checksum
Mac OS Xandroid-sdk_r24.4.1-macosx.zip85a9cccb0b1f9e6f1f616335c5f07107553840cd

Step 5: Copy/paste the boot.img file to android-sdk-windows\platform-tools directory.

Step 6: Then turn OFF your phone.

Step 7: Now to get into the Bootloader Mode. Press and hold the Volume Up button while connecting it again with the USB cable. Your phone LED will turn blue and it will get into the Bootloader Mode.

Step 8: Once in the Fastboot mode (on your phone), navigate to android-sdk-windows\platform-tools directory (on your computer) and open Command Prompt (Shift + Right-click > Open Command Prompt).

Step 9: Type the following command and press Enter.
fastboot flash boot boot.img
Step 10: Then, type the following command and press Enter.
fastboot reboot
Step 11: Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Up or Volume Down buttons for a while untill you see the LED light turns pink or any other Colour.

Step 12: Once you are in ClockworkMod Recovery, select perform a full data wipe by selecting "wipe data/factory reset". Use the Power button to select everything while in the Recovery Mode.

Step 13: Then, perform a cache wipe by selecting "wipe cache partition".

Now this is Optional, but we recommend you to perform a wipe of your Dalvik cache as well. You will not face Boot loop issue or any other Errors. From CWM recovery, go to ‘advanced’ and then select "wipe Dalvik cache".

Step 14: Now go back to the main recovery menu and then tap on the "Install" button. Using your volume keys, navigate to the Android 6.0.1 eXistenZ ROM zip file that you copied to your SD card and select it using the Power button. Confirm the installation on the next screen and the installation procedure should start now!

Step 15: After the installation completes, go to “+++++Go Back+++++” and reboot the phone by selecting "reboot system now" from the recovery menu.

Your Xperia Z3 will boot now and it might take about 5 minutes to boot on your first time after flashing a new ROM. So, please wait.

That’s it! Your Xperia Z3 should now have eXistenZ ROM based on Android 6.0.1 Marshmallow installed on your phone! Go to Settings > About phone to verify.

NOTE: In case if your process interrupts during installation and you brick your device, you can follow this Guide to get back your Original Phone. So don't worry if anything goes wrong.

Any problem during installation ? Do let us know by commenting below! If you find the above tutorial useful and they were helpful to you, please consider giving us a +1 or SHARE with others so they can also take benefit from these!