Since the OnePlus 6 has two different available slots from where updates are initiated and applied, managing new firmware-based tweaks can be easily handled even by newbies or inexperienced Android users. However, a minor mistake when switching from one slot to another can cause severe malfunctions within the Android core system, meaning that you can end up in soft-bricking your device. Well, for those situations, but not only, we have developed this dedicated step by step guide which will teach you how to reinstall the stock OxygenOS firmware on your own OnePlus 6.

Being able to restore your OnePlus 6 back to stock at any moment is extremely important especially if you like to test new tweaks or third party processes. The downgrade operation can help you fix software related issues or reinstall the default Android UI after getting tired of custom ROMs or other customizations developed by third party devs. So, using this tutorial is a great way to learn how to restore your smartphone back to factory state.

As explained, you can use this guide if you have to manually fix software related problems. Well, in that respect, re-flashing the stock Oxygen OS can help you address the most common Android related problems including issues such as boot loops, lags, hangs, screen freeze, battery drain, heating problems, signal strength issues, total blackouts and more.

The OxygenOS package offered below is offered by those of xda-developers so we must thank them for this flashing opportunity. The ROM was created by xda senior member mauronofrio who compiled a fastboot firmware that can restore your device back to stock. Now, an unlocked bootloader will be required on your OnePlus 6 as otherwise the fastboot ROM cannot be successfully installed – do note that when unlocking the bootloader the warranty flag gets tripped.

This installation process comes with a full wipe. Shortly, during the Oxygen OS update / downgrade operation a hard reset will be initiated; also, clearing app data cache will be implied. So, if you’re not precautious enough you can end up in losing important files including contacts, call logs, texts, images, videos, audio files, market apps, internet settings, calendar info, saved passwords, EFS folder, IMEI / NVRAM data and so on. Good; therefore a backup operation is recommended in this case. On your OnePlus 6 you can already sync files by using built-in cloud storage services, or you can sync data within your Google Account. Another way in which you can save personal files is by using already tested backup and restore apps that are available on Google Play.

A computer must be used during the process that’s explained below. On this computer you first have to install Android SDK and in that respect you can use one of our dedicated tutorials: learn how to install Android SDK on Windows or learn how to set up ADB on MAC OS X / Linux. On the same PC the OnePlus 6 drivers must be set up.

On your phone you have to gain developer rights and that can be done by enabling the Developer Options field – for achieving that options you have to navigate towards About Phone from where you then have to tap repeatedly on Built Number until the ‘you are a developer’ message is returned. Finally, from Developer Options (located within general Settings) you have to check the USB Debugging field.

One more thing: verify the battery power that’s left on your OnePlus 6. If this power is lower than 50% you have to plug in the charger first. Otherwise, your device can get switched off during the installation process and in that particular situation you can end up in soft-bricking your handset.

How to Easily Reinstall Stock Oxygen OS on OnePlus 6

  1. First, on your computer download the fastboot ROM available for your OnePlus 6 – you can download the firmware package from here.
  2. Unzip this file into a folder that can be then placed on desktop.
  3. Switch off your smartphone and afterwards reboot its system into fastboot mode.
  4. When done, connect your handset with your computer – just plug in the USB cable.
  5. Now, go to the unzipped folder and from there just run the flash-all.bat executable file.
  6. That’s all; the official Android software will be automatically installed on your OnePlus 6.
  7. Reboot your device in the end and enjoy.

There you have it; that’s how you can reinstall the stock Oxygen OS firmware on your OnePlus 6. Hopefully, this tutorial can help you successfully resolve all your problems. If not, share your issues with us through the comments field available below and we will then try to assist you as soon as possible. Also, stay close for further tutorials and other Android related tips and tricks compatible with your smartphone – in that respect, don’t forget that you can already choose to install LineageOS 15.1 on your OnePlus 6.

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