Not sure about that but my point still stands. M series is a model range specifically made for the Indian subcontinent. The countries in this area has less purchasing power and there are more people who just buy a phone for the sake of having phone, not playing games, video editing and other stuff. So the M series lacks more options than the A series. In return, M series is cheaper than the A series and is repairable at a low cost. Maybe A12 probably has the regular one ui. You should have done little bit of more research before buying that phone.