Xiaomi Mi 4i comes with a polycarbonate rear cover which is non removable and this cover wraps the phone from the rear side giving smooth rounded corners and edges.
It also employs One Glass Solution which leaves no air-gap between protective glass, touchscreen and display. It comes with 16GB of internal storage of which 10.92GB is available to the user. Sadly, there isn't a provision to add in a microSD card.
The Mi 4i runs Android 5.0 Lollipop with the MIUI 6 skin on top. In terms of appearance, there isn’t a different look despite the Android Lollipop treatment. It uses the same 13MP Sony sensor with the only difference being that the Mi 4 has a 6-element f/1.8 lens whereas the Mi 4i has a 5 element f/2.0. On the front there is a 5MP camera with an f/1.8 lens.
The Mi 4i is powered by a 3,120mAh battery which is Xiaomi’s highest capacity battery on a 5 inch device. Xiaomi claims that you can use the phone for over a day and a half on regular usage. The Mi 4i also comes with the Quick Charge feature which charges the phone to 40 percent in an hour.