The bootloader of your Xiaomi Redmi Note 4 is locked by default and in this guide ill show you how to unlock the bootloader of your Xiaomi Redmi Note 4. Benefits of a locked bootloader. Simply a locked bootloader will provide more security. If you have set some sort of security like PIN or password and someone stole your phone then your phone will be of no use to that person. He can't flash a new ROM and use the phone. MIUI provides options to track your phone and erase data on your phone remotely if the bootloader is locked. How to unlock bootloader in Xiaomi phones? Yes, this method works for most Xiaomi phones with a locked bootloader and this is the recommended way. To unlock your phone's bootloader you will need to download the following. Install Xiaomi ADB and USB Drivers Latest Mi Unlock Tool Before you do anything else, please make sure to take a backup of you important data. Now you need to acquire permission from Xiaomi to unlock your phone. Head over to en.miui.com/unlock and apply to unlock your phone by giving a proper reason. Once that is done you will receive a success message on the number you gave during the application process. Even tho you got the success message you can't unlock right away, you will need to wait for a week or more. Meanwhile, you should try to unlock every day, to do this go to Settings> Developer Options> Mi Unlock Status and in that window click on "Add account and device". Usually, it shows some error like: But when it shows "Connect to Network and try again", power off your phone and enter the fastboot mode by pressing the power and volume down buttons together. The connect it to you PC and open Mi Unlock tool from the downloaded.zip file. On the Mi Unlock Tool login to your Mi account and click on the unlock button. This will unlock your phone. If this didn't work then wait and try again the next day. Now to can flash a custom recovery and other beautiful custom ROMs. If you faced any issue let me know by posting it below. If this guide helped you then please and share this thread.