How to Reset Xiaomi Mi4 to Factory Settings
Four easy steps:
Turn off your mobile phone.
Hold and press this buttons: Volume Down + Power button.
From this menu choose option Recovery mode using Volume Down to navigate, and Volume Up to confirm.
Then you will see Android lying down with the red hazard box -press Power button to enter to Recovery mode.


First method: At the very beginnig hold down the Power key to switch off the device. Afterwards press and hold the Volume Up + Power button for a couple of seconds. When the Mi Logo appears on your screen release only the Power key. Keep holding the Volume Up key until the Recovery Mode appears.

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