Samsung provides a new one ui 3.1 update for M21, even M21 is around 15k mobile phone but samsung didn't provides a complete features that samsung provides in M12 mobile phone which is around only 10k.I don't understand why samsung done this with M21...
Many features are missing. Some of them are 1. samsung free on home screen 2. multiple call background options ( by default ) are given by samsung 3. Screen timeout 30 minutes Etc
