Use APKPure App
Get S20 Screen Tweaker old version APK for Android
Fast,lightweight app that changes your resolution and refresh rate of your S20.
Take control of your S20's display.Switch easily between HD,FHD and QHD resolution.Change you refresh rate,maybe you prefer smoothness but higher battery drain or a laggy experience but much more battery life.
Any S20 can use this,S20 normal,S20 Plus or S20 Ultra versions.