Mi 4i is very good mobile. It has 13MP primary camera with 5-element lens, stacked CMOS sensor and 5MP front facing camera5-inch ( 12.7 centimeters) HD capacitive touchscreen with 1920 x 1080 pixels resolution and 441 ppi pixel densityAndroid v5.0.2 Lollipop operating system.
With 1.7GHz Snapdragon 615 64-bit octa core 2nd generation processor, 2GB RAM, 16GB internal memory ( including memory occupied by OS) and 4G dual SIM with 2G/3G/4G support on both dual SIM slotsThis battery has a typical capacity of 3120 mAh and a minimum capacity of 3030 mAh.