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Update Manually Galaxy Grand 2 DUOS G7102 to Android 4.4.2 XXUBNG4 ROM

Android 4.4.2 KitKat XXUBNG4 official update is now live for the Samsung Grand 2 DUOS in India.

Use this guide if you want to manually install the new firmware on your device before the OTA Update arrives in your region. This new firmware can be installed for all Grand 2 DUOS models all over the world.

If you want to learn more about this release and what it has in store for your smartphone, then you check our news article here.

For this tutorial to be completed successfully you will first need to take a look at the preparation info below. Here’s what you have to know before getting to the tutorial part of this poss:

  • use this guide only with the Samsung Galaxy Grand 2 model number SM – G7102.
    – check the model number under Settings> About Phone.
    – if SM-G7102 version is not listed then this guide will not work with your phone.
    – don’t try to update any other devices with the files that you will find in this article.
  • install the Samsung USB Drivers for your PC from here.
  • enable USB Debugging from Developer Options menu.
    – in case Developer Options menu doesn’t show up in Settings, then you will be forced to enable this one first.
    – here’s a guide that teaches you how to enable both USB Debugging and Developer Options for Galaxy S5, but it works with all Android devices.
  • disable Samsung KIES from running on your PC.
    – disable all antivirus applications, too.
    – these applications will block ODIN, that’s the app that you will use in order to flash the new ROM.
  • if your Galaxy Grand 2 DUOS device is rooted, then you will lose root access.
    – if you have a custom Recovery installed, then you will have it replaced with a Stock Recovery.
  • any device running a custom ROM will have its system partition wiped in the process.
    – the internal and external storage won’t be affected by the update.
    – after you complete installation with ODIN you will be forced to apply a ‘factory reset’ if you did install a custom ROM on your Grand 2 DUOS device.
    – do not apply factory reset for devices that are running stock Android firmware as it is not necessary.
  • if you want to save data from installed apps or some SMS text messages, then you should follow the info listed here.
  • sync Contacts info with your default Gmail account.
  • read the whole guide and do not skip any step that is listed in the tutorial.
  • this is a tutorial that has to be follow by advanced users, do not blame us in case you brick the phone nor in case you end up losing any important data in the process.
  • check the device’s battery charge level and make sure that it is over 50%, this will prevent the phone from switching off during the installation process.
  • in case you cannot complete the guide, then you should try to use the comments field in order to leave detailed info about the steps you took. We will try to come up with a viable solution for whatever problem you might encounter.

Now that you’ve read all of the above you can continue to the next part of this post.

How to flash Android 4.4.2 XXUBNG4 Update for Galaxy Grand 2 DUOS:

  1. Download the G7102XXUBNG4 firmware update zip from here.
    – note that you will require to create an account at SamMobile if you want to download the file from their servers.
  2. Extract the G7102XXUBNG4 zip contents and you will get the G7102XXUBNG4 tar.md5 file. Don’t extract any further than that and save the file on your PC.
  3. Download Odin3 v3.09 from here.
    – extract the contents of the zip file and save them on your computer.
  4. Switch off the Galaxy Grand 2 DUOS completely.
  5. Next, boot the phone in Android Download Mode.
    – it can be done by pressing and holding Volume Down, Home and Power.
    – release the buttons when the Warning screen appears, then press Volume UP to confirm Download Mode boot.
  6. Launch Odin3 v3.09 exe on your PC.
  7. Use the USB data cable and connect your phone to computer.
    – wait for Odin to detect the device, then continue to the next step.
    – if the phone is not detected, then you will be forced to re-install the Samsung USB Drivers.
  8. Return to Odin’s main screen and click the ‘AP’ button.
  9. Browse your computer for the G7102XXUBNG4 Grand 2 DUOS tar.md5 file and load it in ODIN.
    – it’s the file that you have extracted in step 2.
    – disable the ‘Re-Partition’ option.
    – don’t change other default Odin settings.
  10. Press ‘START when you’re ready to begin the updating process of your smartphone.
    – do not press any buttons until all files are flashed and, note that the installation will take at least ten minutes.
  11. When all files are installed you will see the phone rebooting.
  12. Disconnect the Grand 2 DUOS from computer when the home screen of your device lights up and ODIN says ‘PASS’.
  13. Use your Login details in order to boot into your phone’s home screen and then start testing all of its new features.

If you need more help you can use the comments field.

If the process fails, then it would be best for you to take a look at the ‘notes’ below, you might find an answer to your problems. Also, you can try to repeat the whole guide more than once, but make sure that your phone meets all the requirements listed in the ‘guidelines’ part of this post.

If everything went according to plan you can close this guide and begin the testing process of your new ROM.


If the ODIN apps fails to install the update, then you can try to repeat the guide. Make sure that you don’t skip any steps, make sure that your phone matches the model number I’ve listed in the ‘guidelines’ and make sure that you have the Samsung USB Drivers installed on your computer.

Ask for help in comments if you cannot complete installation.


In case ODIN says that the installation was passed, but your phone gets stuck for more than 20 minutes at the boot screen or it enters into a boot loop, then you will be forced to apply the ‘factory reset’ from Recovery Mode.

In case you had a custom ROM installed on your Galaxy Grand 2 DUOS and you’ve overwritten it with the Android 4.4.2 G7102XXUBNG4 firmware, then you will also have to apply a ‘factory reset’. Here’s how to do it:

  • power off the phone completely.
  • boot the device in Recovery Mode.
    – press Volume Up, Home and Power simultaneously.
    – release the buttons when you see the Stock Recovery Mode options.
  • select ‘wipe data/ factory reset’ option.
  • confirm.
  • reboot phone in normal mode and you’re done with this whole tutorial.

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