Swift Black Substratum Theme +Oreo Samsung theme 18.0 Patched

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+ Make sure your system supports the use of a bedrock theme. See above list supported.
+ Download the theme substratum engine application and theme. When you open the substratum application you will find the theme inside.
+ Open the theme in the substratum application and select your Android version from the menu at the top. Also select the applications you want to install the theme and press.

Supported Android

Varies with device