Samsung is slow in fixing and complete their stuff. Although One Ui is better than ever but it still some annoying UI bugs. This is why Complete One UI build for. This app will provide System mods to fixing UI bugs that Samsung still ignore, complete Night Mode UI and moreover tweak the UI for better user experience.

This app is Substratum based so you need these apps for it to work:

For S9/S9+ and N9:
Substratum - https://play.google.com/store/apps/details?id=projekt.substratum&hl=en
Andromeda - https://play.google.com/store/apps/details?id=projekt.andromeda

For S10/S10+ and other Samsung devices running One UI:
Synergy - https://play.google.com/store/apps/details?id=projekt.samsung.theme.compiler
Substratum Lite - https://play.google.com/store/apps/details?id=projekt.substratum.lite&hl=en

If you have any question go to this support channel or XDA forum thread (please do not give low rate any ask here because I cannot answer that)
https://t.me/joinchat/IVyxzw8OttVkIEMLHhO__w

// Option A //

To download Complete One UI - Substratum System Mods mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Complete One UI - Substratum System Mods mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Complete One UI - Substratum System Mods from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Complete One UI - Substratum System Mods in HappyMod App.