GPS stopped working after android update

[Android Central Question]

Xiaomi Mi A1 . The gps is not functioning after updating to a Android 9.0.
Is there a solution? How can i return to previous version?

 

[Rukbat]

1. Install GPS Status & Toolbox to see what's happening.

2. You can flash the Oreo ROM (but back everything up - you get an "out of the box" phone.) There's no "downdate" file.

 

[Ron s]

There was a GPS rollback on the 6th It should start working again on it's own I cant explane it do a Google search .