Recently I bought this phone and I've gone through all problems, error and struggles to unlock the bootloader. This tutorial will solve:
Requirements:
Let's start with the tutorial, the main advantage is that you don't need Developer ROM, it will work on Official builds also:
NOTE: Some users may see something like this
It's not a big deal, just wait the amount of hours that are shown there and then try unlocking the phone again. By using this tutorial you will get only 48 hours.
- 86012 error
- 10008 error
- Cannot connect to network
- Not receiving confirmation SMS
- Stuck at 50%
- Stuck at 99%
- Current account is not bound to this device
- Couldn't verify device
Requirements:
- Mobile
- PC
- USB Cable
- Internet connection
Let's start with the tutorial, the main advantage is that you don't need Developer ROM, it will work on Official builds also:
- Setup your MIUI account by going to Settings -> Mi Account
- Open the MIUI Browser from your phone, don't use PC on this step
- Apply for permission here
- Use your phone number with your country prefix to log in (ex. +38970123456 is for Macedonia)
- Write a genuine reason, 2-3 sentences
- After some time you will receive a confirmation SMS (it may take a few days, but with this method I got the SMS in 2 hours on 4 different Xiaomi devices)
- Download Mi Unlocker from here
- Enable developer options by going to Settings -> About phone and tap 7 times on MIUI version
- Go to Settings -> Additional Settings -> Developer Settings and tick OEM Unlocking and USB debugging
- Go to Settings -> Additional Settings -> Developer Settings -> Mi Unlock Status and press Unlock
- Turn your Mobile data, Sync , WiFi and GPS on and wait for 5 minutes and don't turn them off afterwards
- Go to Mi Cloud by clicking here
- Login with your phone number
- Click on Find device and locate your phone
- In the folder where you've extracted the Mi Unlock tool, you will find a program called MiUsbDriver, open it and press Install
- Log in to Mi Unlock by opening miflash_unlock on PC with the same phone number you used in obtaining the unlock permission
- Switch off your phone and go into Fastboot by pressing Volume down and Power simultaneously and connect your phone to the PC
- Once it shows a handset in Mi Unlock click on Unlock button
- Wait for a minute and you are done
- Your phone's bootloader is now UNLOCKED
NOTE: Some users may see something like this

It's not a big deal, just wait the amount of hours that are shown there and then try unlocking the phone again. By using this tutorial you will get only 48 hours.
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