Mi a1 is good device.I have this phone of mi a1.i’m using it. I have been using it since last 3 month. It has an orea update of google but it is not better then miui9.because miui 9 features very good.But this phone is very good at its cost.1.Its sound quality is very good. 2.Ram or Rom is very Good.3.The screen touch quality is also very Good. 4.Its back camera and front camera very good.because its bacj camera is dual. camera.5.Its processor is also great enough. thanking you