The Xiaomi Redmi 3S Prime was not good smartphone. The features are good and also software, but the hardware perfomance and quality was bad. When I go to outdoor the display brighness was very low so I can’t see the message or call. And also the display is not safe because it’s don’t have a gorrila glass so I don’t like it. It’s come with android 6.0 marshmallow with MUI 7, it’s good perfomance and fast operating system. I also don’t like that sim tray. You can’t use the both sim with external sd card at a time. Thank you