How to Unlock Bootloader in Xiaomi 12S Ultra 2203121C Easily [Simple Steps] will share a simple trick with Xiaomi 12S Ultra 2203121C (thor) owners who are trying to unlock bootloader of their phone. It comes with 89.0 percent screen to body ratio, 32MP front facing camera, high dynamic range support, 1440 x 3200 pixels screen resolution, Dolby Vision support, Adreno 730 graphics processing unit and 6.73 inches display. If you have recently bought Xiaomi 12S Ultra 2203121C, then you might be planning to unlock its bootloader. As we know, bootloader is a program that starts whenever phone is turned on. It activates the Android operating system on Xiaomi 12S Ultra 2203121C. Locked bootloader does not allow us to install custom ROM on our phone. It only loads the authorized Android OS with a digital signature. will help you in unlocking Xiaomi 12S Ultra 2203121C bootloader. Previously, I have published the simple instructions for rooting Xiaomi 12S Pro. Now, I will discuss about the step-by-step tutorial to unlock bootloader in Xiaomi 12S Ultra.

I am hoping that you will be able to unlock bootloader in Xiaomi 12S Ultra 2203121C without facing any problem after reading the tutorial written in Don’t forget to activate developer options. You must note that your Xiaomi 12S Ultra 2203121C may lose warranty after the bootloader unlock process. It will let you install Custom ROM on your phone. You must activate OEM unlock option. Bootloader unlock process will also let you install Magisk on your phone, so you will be able to root your phone after unlocking its bootloader.

If you are planning to install official and unofficial LineageOS custom ROM on Xiaomi 12S Ultra 2203121C, then you must be eagerly waiting to unlock bootloader. You must save your important documents securely including messages and contacts before unlocking Xiaomi 12S Ultra 2203121C bootloader, because there is a possibility of losing all documents from your phone during this process.

Below are the steps using which you can unlock bootloader in Xiaomi 12S Ultra 2203121C. will not be responsible if your phone got broken during bootloader unlock process. Xiaomi 12S Ultra battery must be above 86 percentage before bootloader unlock process. You must download miflash unlock tool v6.5.224.28.

How to Unlock Bootloader in Xiaomi 12S Ultra 2203121C Easily [Simple Steps]

1. Sign in to your Mi Cloud Account on your phone.

2. Tap “Settings” Menu on Xiaomi 12S Ultra, then you have to tap “About Phone” option.

3. Tap “MIUI Version” option several times until you see “You are now a developer” message.

4. Tap “Additional Settings” Menu, then tap “Developer options” on your phone.

5. Activate “OEM Unlock” option, then activate “USB Debugging” option on Xiaomi 12S Ultra.

6. Tap “Mi Unlock status” option.

7. Tap “Agree” and then tap “Add account and device” option on your phone.

8. Turn off your phone, then press volume down button and power button simultaneously to put Xiaomi 12S Ultra into fastboot mode.

9. Connect your phone with PC via USB cable.

10. Download miflash unlock tool v6.5.224.28 ZIP file.

11. Extract miflash unlock tool ZIP file. You can find Mi USB driver exe file and miflashunlock exe file after extracting it.

12. Install Mi USB driver on your PC.

13. Run miflashunlock exe file on your PC.

14. Tap Agree button and then Sign in with your Mi Account after running miflash_unlock exe file on your PC.

15. Click “Unlock” button, then click “Unlock anyway” button within miflash tool to start the process.

16. Click “Reboot phone” button after you see “Unlocked successfully” message.

You have successfully unlocked bootloader in Xiaomi 12S Ultra 2203121C. If you are experiencing any difficulty while unlocking Xiaomi 12S Ultra, then don’t hesitate to share your issue with Please submit your email address and subscribe to get more information regarding Xiaomi 12S Ultra. You must check your email to activate subscription.

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