We have got some really good news for Sony Xperia Z2 Premium users. The Xperia Z2 owners can have the taste of Xperia Z5 or Xperia X. The ROMX guys are back with a new Android Marshmallow based custom firmware ROM and Xperia Z2 is the lucky one who’s getting an update with ROMX Marshmallow Custom Firmware ROM. 

The latest ROM is based Sony flagship device Xperia Z5 and Xperia X with most of these devices features and the wallpapers. You also get the latest widgets and themes of Xperia Z5 which is pretty cool for a mobile like Sony Xperia Z2. Apart from that it is a stable ROM and is very fast and smooth for Xperia Z2 smartphone. The even better news for Xperia Z2 users is that we exclusively bring you this detailed and a comprehensive tutorial on how you can download and install this ROMX Marshmallow Custom Firmware ROM on Sony Xperia Z2 smartphones.

You may also read: How to update Nexus 5X to Android 8.1 Oreo OPP5 Developer Preview

So let’s get you started with some important things you need to keep in mind before the installation process.


  1. This update will delete all your data so make sure to back up.
  2. AndroidiOSpack will not be help responsible if something goes wrong with your device during or after the update.


  • 1- Make sure you fully backup your data on your . As this update will wipe all your data from your device.
  • 2- Download Sony USB Drivers.
  • 3- Make sure you device has a custom recovery installed.
  • 4- Your device’s bootloader has to be unlocked.
  • 5- Dalvik Cache wipe is helpful for performing from the recovery mode.
  • 6- You also have to have ADB and Fastboot downloaded on your personal computer.

Essential Downloads:

How to update Xperia Z5 Premium with ROMX Marshmallow Custom Firmware ROM:

Step 1- First of all download the file mentioned in essential download on to your personal computer.

Step 2- Extract zipped ROM file titled boot.img and save it separate on your person computer.

You may also read: How to update Nexus 6P to Android 8.1 Oreo OPP5 Developer Preview

Step 3- Connect your device with your personal computer using a USB cable.

Step 4- Copy paste both the files you downloaded in first step onto your device’s SD card and not in any of your device’s folder.

Step 5- Copy the file you extracted in 2nd step titled boot.img and past it into directory of android-sdk-windows\platform-tools.

Step 6-Turn your mobile off.

Step 7- Next press and hold onto the Volume up button for enabling Bootloader mode which will turn your phone screen blue when enabled.

Step 8- Locate the directory of android-sdk-windows\platform-tools in your desktop and press Shift + Right-click > Open Command Prompt in which you should type ‘fastboot flash boot boot.img’ and press Enter.

Step 9- Next type this command and press Enter again. ‘fastboot reboot’.

Step 10- Lastly you should long press the Volume up/down key until the phone’s screen turns a color other than blue for entering into Recovery mode.

Step 11: Once in the Recovery mode, tap “wipe” button to erase all data from your device, then go down and tap “swipe to the factory reset” option.

Step 12: To flash the ROM, you have to head back to the main menu, tap on install option and then search for the ROM zip file that you have copied to your phone’s memory in step 2. Select it, tap on the confirmation button to proceed on with the installation process.

Step 13:  Once the installation process is completed, you should go back to ‘+++++ Go Back +++++’ to reboot your phone.

That’s about it. You have downloaded ROMX Marshmallow Custom Firmware ROM onto your Xperia Z2 smartphones.

You may also read: How to update Samsung Galaxy Note 4 N910F with Android 6.0.1 Ditto Custom ROM with Note 7 camera features



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