The OnePlus 6 is capable to offer a stable and extra-fast stock Android experience thanks to its high-end performance, but everything can get better if you are ready to try something different instead of the built-in Android system. Of course, we’re talking about installing a custom update as in that way you can improve general performance and customize the way your OnePlus 6 runs on a daily basis. Well, in that respect today we are about to discuss about the unofficial release of Lineage OS 15.1 for the OnePlus 6.

Xda senior member LuK1337 managed to port and compile the official LineageOS 15.1 for the OnePlus 6. Thus, this custom ROM build isn’t developed by the Lineage OS team but by a third party developer. Anyhow, the Android 8.1 based firmware is stable enough for a daily use which means that you can try it without worrying about bugs, lags or other software related issues. Do note that the software is still under development stage so further improvements will be added during the following period of time.

As for the LineageOS 15.1 ROM that’s available for your OnePlus 6 you need to know that it brings a clean, stable and smooth version of Android 8.1 Oreo firmware. The OS will be coming with features that cannot be found on the stock Android UI along with other special apps, processes and capabilities that are there to improve the Android system and the results that you receive from your smartphone. Shortly, with this custom ROM installed you will be able to upgrade the battery life, bump speeds and customize / optimize everything else.

Replacing the default Android platform with LineageOS 15.1 is not a process that’s supported by your OEM or by Google. And that’s why, if you agree to complete this Android 8.1 Oreo update operation, you will lose your OnePlus 6 warranty and possible access to built-in apps or tools. However, you shouldn’t worry as the warranty flag can be afterwards restored – in that respect you might have to manually reinstall the official Android OS on your smartphone.

This custom flashing procedure can be performed only in certain conditions and in that matter you now have to know that several additional operations are being required. Shortly, you first have to unlock the OnePlus 6 bootloader; also, you need to install TWRP recovery on your phone and ensure root access as otherwise the Android system will not be prepared for the update operation that will shortly follow.

A backup is more than indicated too. Saving your personal data shouldn’t be an optional process because during the LineageOS 15.1 flashing operation a hard reset will be performed – you will also have to clear app data cache. So, protect what’s important for you by applying a general backup: on your OnePlus 6 you can already use backup and restore apps, or you can choose to sync your files with your Google Account; or you can download backup and restore apps from Google Play – in that case make sure you choose to install only already tested apps.

A Nandroid backup is also a good idea especially if you want to avoid any possible problems – this special backup process will help you save the current Android OS that runs on your OnePlus 6. Thus, if the new Android 8.1 Oreo firmware will not run as expected you can successfully decide to restore the stock Android software by flashing the Nandroid backup package.

This is a manual update operation as the Lineage OS 15.1 firmware can be installed only if you first follow:

  • Make sure that you can use a computer or a notebook.
  • Your OnePlus 6 and its official USB cable must be at your disposal as a connection between your devices will be required.
  • On your smartphone you have to enable Developer Options: navigate towards ‘Menu - > Settings - > About Phone’ and start tapping repeatedly on Built Number until the ‘you are a developer’ message is returned.
  • Next, on your device, from Developer Options, you have to enable the USB Debugging feature – otherwise you won’t be able to properly connect your phone with your computer when that will be asked.
  • On your OnePlus 6 verify the amount of power that’s left – just make sure that the power is higher than 50%; if it’s not, plug in the charger before doing anything else.
  • Note that when the power is low your handset can get turned off while the update operation is running; if that happens you can end up in soft-bricking your Android based device – different malfunctions can happen so try to avoid such unpleasant situations.
  • Make sure you follow the guidelines from this tutorial only if you own the OnePlus 6 because the LineageOS 15.1 firmware mentioned below is compatible only with this particular handset.

How to Update OnePlus 6 with LineageOS 15.1 custom ROM firmware

  1. Power on your computer and enable a WiFi connection – you afterwards have to access this page as from there you need to download the Lineage OS ROM that’s available for your OnePlus 6.
  2. Also, you have to download compatible Google Apps because it’s not included in the update package and it has to be installed separately.
  3. Save the downloaded files on desktop.
  4. Switch off your OnePlus 6 and wait while the power off process is completed.
  5. Enter recovery mode and from that environment complete a full wipe: choose ‘wipe data factory reset’ followed by ‘wipe cache partition’ and by ‘wipe dalvik cache’.
  6. Return to main menu of recovery when done and choose ‘reboot system now’.
  7. Next, connect your handset with your computer by plugging in your phone’s USB cable.
  8. From your PC select the downloaded files and transfer them on your smartphone.
  9. In the end, remove the USB cable and switch off your OnePlus 6.
  10. Once more, reboot recovery mode on your Android device.
  11. This time, from recovery tap on Install and pick up the LineageOS 15.1 package.
  12. Swipe and wait while the Android 8.1 Oreo software is being installed.
  13. When done, repeat that last step and apply the Google Apps file.
  14. And, in the end from main menu of recovery select ‘reboot system now’.
  15. That’s all.

Perfect; the update operation was successfully completed meaning that you can now boot your OnePlus 6 to LineageOS 15.1 custom ROM. Start testing the new Android 8.1 Oreo firmware and note down everything that might help other users decide whether to follow this step by step guide or not. Of course, share your update experience with us by using the comments field available below. Enjoy.

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