Last month it was discovered that with the release of Android 8.0 Oreo, users would be able to theme the operating system’s UI without the need to root their handsets. With the use of the Substratum theming engine, users can use Android’s Overlay Manager Service (OMS) to change up the look of almost every aspect of the OS. Here’s a quick look at how to do this. How to install custom themes without root Getting started: The prep work Download the Substratum application from the Google Play Store for free Download the Andromeda application from the Google Play Store for $2.49 Download the Andromeda desktop client for MacOS, Windows, or Linux from XDA Enable Developer options and USB debugging Open your device’s Settings menu Scroll down and tap on System and then About phone Locate Build number at the bottom of the list and quickly tap on it seven times in a row Tap on the back button and enter...