Nokia Mobile has made available the Android Pie downgrade package for Nokia 8.1. So, now you can downgrade/rollback to Android Pie if you are not satisfied with the Android Q beta. Android Q is indeed a work-in-progress and the features are not yet final. So, the current builds might be unfit for everyone who is not a developer.
Steps to downgrade Nokia 8.1 from Android Q to Pie
You need to follow mostly the same steps as you did while upgrading to Android Q beta.
- Download the Android Q downgrade package from the Nokia Developer website.
Alternatively, you can download it from the mirror in OTA post.
- Reboot your Nokia 8.1 phone into recovery mode.
- Send the downgrade package to the phone using the adb command:
adb sideload file.zip
Replace file.zip with the name of the downgrade package. You need to use the full path if the CMD or Powershell is opened in a different folder.
- Wait for the installation to finish.
- Reboot the phone when it completes.
You should be back to Android 9.0 with the latest April 2019 security patch.
Nokia will push more optimized and feature enriched Android Q builds in the future. You can update to Android Q beta again when you think that it is worth giving it another try. I recommend that you skip at least 2 more builds before trying it out again on a phone which you have to use daily.