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How to Update OnePlus 3T to Android 8.0 Oreo with ParanoidAndroid custom ROM

The OnePlus 3T should now run on the latest Android build. However, if you are an advanced Android user then you are probably looking for a custom ROM alternative. If you are, then perhaps you should want to try and test the new Paranoid Android release. And all the details related with this update operation are detailed below: the advantages and the risks implied, the essential pre-requisites and the actual steps that must be followed for sucesfully installing ParanoidAndroid on OnePlus 3T.

If you want to learn how to manually install the Android 8.0 Oreo OTA on your OnePlus 3T, use this guide. As you will see, the update process explained there will be different from what you can use during the following guidelines. The reason for that is simple: a custom ROM cannot be installed in the same way as the official firmware.

The Paranoid Android ROM is not developed by OnePlus but by those of xda-developers. So, this particular Android 8.0 Oreo update has nothing to do with your OEM. Basically, you are going to perform an unofficial update operation. So, the actual flashing process will be a special one, dedicated especially for applying custom updates. Also, since an unofficial process will be performed, you will lose your OnePlus 3T warranty – re-flashing the stock Android OS might help you replace the lost warranty if that will be required.

Now, the Paranoid Android release for OnePlus 3T brings a stable and smooth Android 8.0 Oreo platform. However, the ROM is still under development stage as this is an early release – don’t worry, you can use the ParanoidAndroid system on a daily basis without experiencing major problems (from time to time you can still deal with minor soft-related issues though).

So, in that respect, a Nandroid backup can help you avoid further unpleasant situations. Through a Nandroid backup you can save the current Android OS that runs on your OnePlus 3T so you can afterwards flash it back on your phone – if, for example, the new custom Android 8.0 Oreo software will not run properly, you will be able to flash the Nandroid backup package and restore the stock Android system.

Some additional operations must be completed if you want to apply the steps from below – a custom ROM can be flashed only in certain conditions. So, in that respect, begin with unlocking the OnePlus 3T bootloder – that’s the first unlocking process that can be initiated on the Android OS. Then, gain root access on your phone for removing factory and default restrictions – because the Android 8.0 Oreo ROM will have to modify, customize and tweak built-in features, apps and capabilities. Finally, install the latest version of TWRP recovery on your phone – through TWRP recovery you will complete the actual update operation.

Good; now the Paranoid Android ROM can run without problems on your OnePlus 3T only if you first wipe the internal storage system. And a full wipe can be applied through a hard reset process. The wipe will be initiated through recovery right before the update operation and you have it all detailed below. What’s important at this moment is the fact that you can lose your personal data, info, accounts and files. Thus, try to secure everything that might be required afterwards. A backup process can be completed on the OnePlus 3T in different ways, though usually it will be enough to sync your files with your Google Account, use built-in cloud storage platforms or download compatible backup and restore tools from Google Play.

A computer will be needed during this manual update operation – don’t worry, on the computer you will only have to save the required files. On your OnePlus 3T you need to enable Developer Options, an operation that can be performed by tapping repeatedly for 7 or 10 times on Built Number, just until the ‘you are a developer’ prompt is displayed. Afterwards, access Developer Options (located within menu – > settings) and check the USB Debugging feature.

Verify the power that’s left on your phone. As a general rule, you should charge your smartphone before updating to Android 8.0 Oreo if the power that’s left is lower than 50%. If the power is lower than this value, your handset can get switched off right in the middle of the flashing process – so, for avoiding soft related problems, you should charge your OnePlus 3T before doing anything else.

How to Update OnePlus 3T to Android 8.0 Oreo with ParanoidAndroid custom ROM firmware

  1. On your computer save the files which will be used – from this page download the Paranoid Android firmware and from here compatible Google Apps.
  2. You will have to install Google Apps separately because this package is not included in the custom ROM file.
  3. Place the files somewhere on desktop, or where you can easily access them.
  4. Switch off your smartphone.
  5. Wait a few moments and then reach recovery mode on your OnePlus 3T.
  6. It’s time to make a hard reset and to clear app data cache; so, from recovery mode choose “wipe data factory reset”, followed by “wipe cache partition” and by “wipe dalvik cache”.
  7. Return to main menu of recovery and choose to go back to Android mode.
  8. Now, plug in the USB cable and connect your handset with your computer.
  9. Select the downloaded files from desktop and copy-paste the packages on your phone.
  10. Unplug the USB cable when done – the computer will no longer be required.
  11. On your OnePlus 3T return to recovery mode.
  12. From TWRP recovery, tap on Install and pick up the ParanoidAndroid custom ROM file. Then, swipe and wait while the Android 8.0 Oreo software is flashed.
  13. Remember to repeat the last step for installing Google Apps.
  14. And when these processes are completed, from main menu of recovery select ‘reboot’.
  15. That should be all.

Congratulations; you have successfully flashed the Paranoid Android ROM on your OnePlus 3T. You just have to test this custom Android 8.0 Oreo release. Of course, don’t forget to let us know how the update process worked for you. You can share your observations with us and with the other users easily – you can fill out our contact form or you can use the comments field from down below.

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