I want to downgrade my Nokia 5.1+ to orio...
It is not possible to downgrade to Android Oreo.
Just go to nokia service centers and tell them why you want to downgrade to Oreo. If your reason is acceptable you will get the Oreo downgrade for your phone like the new one
The first comment still stands
Why pie works very well?
It looks like you're new here. If you want to get involved, click one of these buttons!