You can read a lot of important information from Fastboot Mode. We can use the XIAOMI fastboot data in order to find the desired firmware, downgrade software, change the region of the firmware or root device, The most important info is bootloader status (locked or unlocked). The unlocked bootloader makes your out of warranty but it gives you also the possibility to change the firmware of your device.
Then you should install Adb mini with fastboot tools setup to get all necessary drivers and applications.
Windows 10 users should additionally go to c:\Windows\inf and search file "wpdmtp.inf" press right button on it and select INSTALL
Check Bootloader Status Tutorial
Turn off phone completely.
Then hold down the Volume Down and Power Button.
Release both keys as soon as the Fastboot Mode pops up.
Connect to computer by using the USB Cable.
Turn on Command Prompt as Administrator. You can find it in Start Menu.
Make sure that you are using the default directory of ADB and FASTBOOT. If didn't change the path, you can find files in C:\ADB
Use the following commands:
type cd\ and press Enter button.
type cd adb and press Enter button.
Next enter fastboot command:
Type in fastboot devices and press enter key
This command checks communication with phone and sure that all drivers are installed correctly.
Enter fastboot oem device-info and press enter key
This command gives you all necessary information. The most important info is bootloader status, we can check here if we have locked bootloader or unlocked.
The information table should look as follows:
(bootloader)Device tampered: false
This means that the phone is working normally without any software problem
(bootloader)Device unlocked: false
This means that bootloader is LOCKED
(bootloader)Device unlocked: true
This means that bootloader is UNLOCKED
Other Useful Fastboot Command in Xiaomi phones:
This command is used to reboot from fastboot mode to normal use.
fasboot oem lock
This command is used to LOCK Bootloader from UNLOCK state if needed.
This command is used to reboot from fastboot mode to EDL MODE
(only older phone supported MIUI 7 and older).
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