Hey Guys update your Galaxy Grand Duos to Android 6.0.1 Marshmallow. Today in this tutorial I will lead you through the procedure to flash the CyanogenMod’s CM13 custom ROM on your device. This ROM has all the features of the official Android Marshmallow firmware and its AOSP.Samsung Galaxy Grand Duos

To flash the ROM it is mandatory to root the device first and also install custom recovery on your device. But make sure if you root your device you void your device warranty as well. So, it is necessary that you follow all the points given in the description below carefully. If anything goes wrong during the process or after flashing the ROM you will be the only person responsible for it.

Once you have a custom ROM on your device you can access many advanced features which are not accessible in the official firmware. SO, if you are ready to flash the ROM on your Samsung Galaxy Grand Duos.

Preparing your Phone

  • These instructions are strictly for Samsung Galaxy Grand Duos GT-I9082, so do not try it on any other device or you may brick your device.
  • The Device should be fully charged.
  • Install device USB drivers on your computer.
  • Back up all the required data to some safe storage.
  • Make a Nandroid backup of the current ROM.
  • Make sure the device boot-loader is unlocked.
  • Root your device and install custom recovery  on it.
  • Enable USB debugging mode of your device. Go to Settings > Developer options > USB debugging mode.USB Debugging

Download and Install Android based Custom ROM

  1. Download Android 6.0 Marshmallow based CM13 custom ROM from here.
  2. Download the Google App’s for Android Marshmallow from here.
  3. Connect the device to computer and transfer both the files i.e ROM file and Google App’s file to your device root storage.
  4. Disconnect the device and turn it off completely.
  5. Reboot the device into recovery mode, press and hold Volume Down + Home + Power key for a few seconds.
  6. When in recovery mode, tap on Wipe tab and select the options you like to wipe, given under it.
  7. Now, confirm the wipe action by swiping the button at the bottom of the screen.
  8. Now, return to the main menu and tap on Install tab.twrp
  9. Locate the ROM file stored on your device and select it.
  10. Swipe the button at the bottom to flash the ROM file on your device.
  11. In the same way flash the Google App’s on your device.
  12. Return to main menu and tap on Reboot.
  13. The System will now reboot in normal mode.
  14. That’s all you can now check the device Android version in Settings > About device > Android version.