You will never be lost in galaxies of settings and apps. MIUI is easy to use and get job done in lesser time. I also use redmi 2 prime without screen protector but redmi 4A with protective screen also fine and responsive Firstly very great delivery, ordered on 19 may and got it on 21 may. Secondly, the phone is very great looking gray color and finishing is very perfect. The notification light is even bigger and brighter than 3s prime. The Xiaomi Redmi 4A runs the Android 6.0 Marshmallow operating system wrapped under MIUI 8 out of the box. The MIUI 8 which also is seen on the Redmi 4, brings with it new exciting features like the Energy saving mode which disables application running in the background when the battery level is low, the gallery comes with quick share controls, and also allows users to set a password for their notes.