Theming Mi A1 without ROOT access or Substratum!!
As you guys know Android Oreo supports rootless OMS, as because of this we can change Themes on devices running Oreo without having ROOT access! The same here goes for the Mi A1.
If you have successfully updated to Android Oreo you will be able to use this feature! Just follow the simple steps below!
Step1: Download the themes: Mi A1 Themes.zip
There are lots of themes in the above zip, separately for dark and light UI lovers.
Step2: Install any 5 of these themes.
Step3: Go to Settings/Display/Advanced, here you’ll find the Device Theme option. Click on that and select the theme of your choice. Done!