Steps To Fix Substratum Overlay Issue In Samsung Devices: As soon as the popular CyanogenMod custom ROM was discontinued, the CM Theme engine which supported hundreds of unique themes also quickly became irrelevant. It was immediately replaced by a better version with more number of themes known as the Substratum Theme engine. During the initial stages, Substratum was supported only by a few devices and it had only a few hundred themes available for use.
But it has grown enormously now and a lot of popular devices are now supported by the Substratum Theme Engine powered custom ROMs and a lot of new themes are also now available. The best part about the Substratum Theme engine is that unlike the CM Theme Engine, you can use multiple themes at once and you can even use different themes for different aspects of your phone based on the Custom ROM you are using.
For example, you could use one theme for the settings app, another one for the notification panel and a different one to change your boot logo or fonts. This endless customization was also one of the main reasons for its huge popularity. However, the Substratum theme engine and some popular Substratum themes are often incompatible with some Samsung Galaxy devices. Some of them do not respond, some even cause the System UI to crash. Luckily, you can fix this issue by following the simple method below.
How To Fix / Solve Substratum Overlay Issue In Samsung Devices
Method 1: Boot into safe mode
Step 1: Switch off your Samsung device by long pressing the power button
Step 2: Now turn on your device and wait till the Samsung logo appears.
Step 3: As soon as you see the logo, repeatedly press and hold and the Volume down button and you will now be booted into the Safe mode.
Step 4: Now unlock your device and go to Settings->App. You can find the installed Substratum theme or overlay that is currently causing the issue.
Step 5: Just open the particular app and then uninstall it.
Step 6: Now reboot normally and the issue will be resolved.
Method 2: Use the emergency mode
Step 1: Now hold the power button and then select the Emergency mode option from the menu.
Step 2: Now you will be entered into the Emergency mode jusr click on the checkbox appearing on your screen to proceed.
Step 3: Now go to the Settings app and then open the Apps list.
Step 4: Find out the Substratum overlay that is causing the issue in the list and then open it.
Step 5: Now disable all the permissions given to the app including the storage permission.
Step 6: Now deactivate the Emergency mode and go back to the TouchWiz launcher.
Step 7: You can now open your settings and directly uninstall the app that is causing the problem.
That’s it. You have successfully disabled the Substratum theme issue on your Samsung Galaxy device. You can now proceed to use your device normally. If you have any doubts regarding the above processes, let us know in the comments below.