Hi guys,
as I have seen (too) many people flashing the Android Q Developer Preview and not knowing how to roll back to Pie, here's an extended written guide with screenshots
But sir, how do I get back to Pie?
Well, here is the guide.
Prerequisites
Steps
A: Take a backup of your stuff. Everything will be erased once you flash the rollback build, so
backup your nudes before doing anything.
B: Download the rollback build that fits your device.
If you are opening this from the Community app, you will get a white screen when you tap a link. On that white screen, tap the three dot menu and choose "Open in browser".
This will start to automatically download your file.
C: Rename the file. (
I do not know whether this is need anymore, just check it yourself.)
The reason for this is that the rollback build, for some reason, is downloaded as a .zip.jar file, while the updater needs it to be a .zip file.
Go to the File Manager app and navigate to the downloaded rollback build.
The name of the file, in the end, should be
fulldowngrade_wipe_MSM_17819_181025_2315_user_MP1_release.zip
![[IMG]](https://forums-images.oneplus.net/data/webimg/2021/02-01/6017a14b7b173.png)
Move the file.
The official guide says "root" directory. What is this? Well, doesn't have anything to do with rooting your device.
It's just the thing that you see when you open the File Manager first. Here you see the "root" folder:
![[IMG]](https://forums-images.oneplus.net/data/webimg/2021/02-01/6017a14baa29a.png)
This is where your file should be placed.
![[IMG]](https://forums-images.oneplus.net/data/webimg/2021/02-01/6017a14bd838a.png)
Flash the rollback build.
Follow these steps to get there.
- Settings
- System
- System updates
- Gear icon (upper right corner)
- Local upgrade
- Tap the file
![[IMG]](https://forums-images.oneplus.net/data/webimg/2021/02-01/6017a14c0d6cc.png)
Do not flash a Developer Preview again.
This may come off as rude, but if you really needed this guide, chances are you are not a person who has the knowledge which is needed to play around with a
Developer Preview.
Just as a reminder, the risks and who the
Developer Preview is for, are clearly stated in the release thread:
Thanks for reading, hope I could help a person or two.
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