[Realme C12 Guides, News, & Discussion] HemanthJabalpuri:
After 6 months from launch date, we finally got bootloader unlock permission on March 2nd 2020 for Realme C12 initially based on Realme UI 1.0. Later Realme gave permission for UI 2.0 too.

Before doing anything to device, keep a copy of Stock ROM from here in your PC or SD Card.

Unlocking bootloader will trip safetynet. If you want to use bank apps or some apps that use SafetyNet, then you have to pass SafetyNet. To pass it we have to use a Magisk module called 'Universal SafetyNet fix' Or use a custom rom or GSI that uses it if you dont want Magisk.

Also locking bootloader seems to lead 'Red State' in many devices. This can only be solved by going to Service Center. So be prepared for it. To get rid of it flash stock rom once even if you didn't done any modifications.

Prerequisites:-​

- A PC

- USB Cable(We can use charger cable)

- Platform-tools

- Patience

Step 0 - Great! You're ready to go. Make sure to backup your phone's data before continuing on with this tutorial, as unlocking will make it factory reset (wipe)!

Step 1 - Download and Open In Depth Tool from below

For UI 1.0 https://download.c.realme.com/flash/Unlock_tool/DeepTest_realmeC12.apk

For UI 2.0 https://c.realme.com/in/post-details/1526491339024314368

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Step 2 - Click “Start applying”.

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Step 3 - Please read the disclaimer in detail, select the checkbox, and submit your application

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Step 4 - The Application Will be checked by realme Servers..(Wait 10 mins)

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Step 5 - Go back. Remove app from Recent apps. Open the app and click on Query verification status which is at top right

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Step 6 - You can now click “Start the in-depth test” and the device will reboot to fastboot mode automatically. The following string will display on the screen: fast boot_unlock_verify ok

Step 7 - Now Download and install the fastboot tool on your PC and Connect the device to PC using USB cable and ready to unlock it.

Step 8 - Now you are in Fastboot Mode. Type this command

fastboot flashing unlock

in command prompt of PC and Press enter.

Step 9 - On your phone press the Volume Down key to select "UNLOCK THE BOOTLOADER” (or press the Volume Up key if you have changed your mind to select "DO NOT UNLOCK THE BOOTLOADER”).

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Step 10 - Now type

fastboot reboot

. Your phone will reboot and all user data on the phone will be erased - I recommend you perform a data backup prior to applying.

And there you go! Your phone will reboot and you can set it all up again. with the ability to root and you can also install GSIs/custom ROMs/recovery!

After unlocking, flash stock rom once from stock recovery to fix some 'Red state' issue and fastboot errors that may lead to GSI booting issues. See this for flashing stock rom. With this you will also get a idea of flashing stock rom.​

Q: Will unlocking my bootloader void my warranty?

A: No, it will not. Unless you brick your device.

Q: I tried unlocking my bootloader but, PC doesn't detect my phone, even though it's in fastboot mode and connected. Help?

A: Here are some things you can try:

- Try another USB port.​

- Try another USB cable.​

- Download and install exe for 64-bit and 32-bit​

- Restart PC​

- Connect device to PC​

- Go to Device Manager​

- Double Click on Unidentified Realme C12(Device with exclamation mark)​

- Click on Update Driver​

- Select Browser my computer​

- Select Let me pick​

- Select Android Device​

- Click on Next​

Enjoy!​

Q: I am getting carrier-customized phone?

A: See this