Install Android 6.0 Marshmallow on OnePlus One [AOSP]


Good news for the users of OnePlus One, Android 6.0 Marshmallow AOSP ROM has been released for OnePlus One. In this guide we are here at to help you install the latest firmware Android Marshmallow on your OnePlus One. We have already posted guide on the installation procedure of Android 6.0 Marshmallow on several devices including Nexus with both stock and the AOSP builds. AOSP Android 6.0 Marshmallow release rumors for OnePlus One were heard long ago and now its the day we are writing tutorial to flash the latest firmware.

The Android 6.0 Marshmallow for OnePlus One is currently in the initial stages so you might notice some bugs but the upcoming updates will be bug free. So if you are getting impatient to see Android 6.0 M on your OnePlus One then this guide is for you. You can easily revert back to Stock firmware whenever you wish to do so, just go ahead and you will be guided through complete process to install Android 6.0 M on OnePlus One.

How to install Android 6.0 Marshmallow on OnePlus One

Disclaimer: This tutorial includes multiple operations which includes installing Custom ROMs, Custom recovery and root. Follow the guide on your own risk, we are not responsible if you brick or damage your device however the chances of bricking a device are rare but you have to pay full attention on the complete guide to avoid any issues and difficulties while performing any of the above mentioned operation.


  • Please ensure your phone battery should be charged at minimum 80%
  • Download and install latest USB drivers
  • Your device should have a working CWM or TWRP recovery installed.

Download Android 6.0 Marshmallow build specified for your OnePlus One from the below provided link.

Download OnePlus One Android 6.0 Marshmallow ROM

Download Google Apps for Marshmallow (Gapps)

Process to install Android 6.0 Marshmallow on OnePlus One

Connect your device to PC and transfer the ROM and Gapps zip files on the internal storage of OnePlus One.

Turn of your device and boot into CWM custom Recovery menu by the hardware keys combination or using any third party app (Mostly found in Play store).

Once your device enters into CWM recovery, create a Nandroid backup of your device or follow our guide to create a Nandroid backup (this will create a backup of your complete device including current firmware) if something goes wrong you can restore your previous firmware.

Once the Nandroid process completes, navigate and select wipe data/factory reset.(this will erase your data)

Now it’s the time to flash the Android 6.0 Marshmallow ROM on your device. Choose “install zip from sdcard” >> choose zip from sdcard & navigate to the folder in which you have copied the custom file and select it.

Select “yes” to confirm install, wait for a few minutes till the file is completely installed in your device.

Once done with the above step, now apply the same process with the installation of Android 6.0 Marshmallow gapps.

Wait for the installation process to complete. The first boot up may take 5-7 minutes.

If your device is taking longer then 7-10 minutes then follow this guide to to fix this issue 

That’s it! You have successfully installed Android 6.0 Marshmallow on your OnePlus One. Experience the latest features of Android 6.0 Marshmallow custom ROM on your device. If you have any query feel free to contact us by posting your queries in the below provided comment section. Follow us on Facebook/Twitter/Google+ for future update.

A Software Engineer who loves to hang around latest gadgets and writes his own experiences to get the best possible and accurate information.
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