Xiaomi Mi3 is a high-end Android smartphone, released by Xiaomi Tech in November 2013. The Mi3 features a 5″ IPS LCD display with 1080 x 1920 resolution. It’s powered by either a 2.3GHz quad-core Snapdragon 800 processor, or 1.8GHz quad-core Nvidia Tegra 4, depending on region. Both feature 2GB of RAM. Internal storage comes in at either 16GB or 64GB internal storage. The Mi 3 has a 13MP shooter with full 1080p video recording, and a 2MP front facing camera. The device is fed by a non-removable 3050mAh battery.
The Mi3 runs on a custom MIUI firmware. If you are not a big fan of it, you can revert to the stock Android firmware via the CM 12 custom ROM. Also, this ROM will update the phone to the latest Android 5.0.2 OS. Follow the guide given below.