Unlocking tool supported devices: Xiaomi Redmi Note 3, Xiaomi Mi 4C, Xiaomi Mi Note Pro

Note:
1. The unlocking procedure only supports MIUI China developer version (6.1.12 or later version) currently. MIUI China stable version will get supported in future updates

2. Some Mi Note Pro users could not unlock bootloader after updating to 6.1.12. This issue will be solved in the next update

Unlocking Bootloader Procedure:
1. Download zip file (recovery file) of China developer ROM for your device, put it into phone storage. Go to Updater app, press the three dot on upper right corner, and select 'Choose update package'. Choose the zip file you just put in phone storage. The update will wipe all user data, please make backup beforehand.
2. Log into the Mi account which has acquired unlocking permission on your device
3. Turn off your device, press the Power button and Volume - button at the same time to enter bootloader mode
4. Log into the unlocking tool on PC with the same Mi account. Connect the device with the PC using USB cable
5. Press 'Unlock'. The unlocking process will complete in about 10 seconds

After unlocking bootloader, users will be able to flash fastboot ROMs and custom ROMs. The unlocked device will be marked in the official service end. Users could lock bootloader again by flashing official MIUI ROMs. (This will need to use fastboot oem lock. Please note to flash offcial MIUI ROMs, otherwise your system won't be able to start)

Unlocking Tool Download: miflash_unlock-1.1.0121.2