How to Unlock bootloader & Root Poco C75

If you’re using the Poco C75 (MediaTek variant) and don’t want to deal with Xiaomi’s waiting period, account binding, or original unlock utility, there is another way. Using MTK Client, you can unlock the bootloader directly by modifying the security configuration on the device.

This method is for advanced users. If you’re already familiar with installing, boot images, and Magisk, you’ll feel right at home.

Note

This will wipe your data
Warranty may be void
A mistake can soft-non-functional the phone
This guide is for MediaTek Poco C75 only

If you’re comfortable with EDL / BROM-level tools, continue.

Requirements

Poco C75 (MTK)
Windows or Linux PC
Python 3.8+
USB cable
Stock Stock ROM boot.img
MTK Client
👉 https://github.com/R0rt1z2/mtkclient
Magisk APK
Contact Me for Professional Service

Step 1: Set Up MTK Client

Clone the MTK Client repository:

git clone https://github.com/R0rt1z2/mtkclient
cd mtkclient

Install dependencies:

pip install -r requirements.txt

Make sure your device drivers are installed (MediaTek USB / CDC).

Step 2: Boot Phone Into BROM Mode

Power off the Poco C75 completely
Hold Volume Up + Volume Down
Connect USB cable to PC
Release buttons once detected

MTK Client should now recognize the device.

Step 3: Unlock Bootloader (seccfg Method)

This is the core step. MTK devices use a seccfg partition to control lock state.

Run:

python mtk.py da seccfg unlock

If successful, you’ll see confirmation that the bootloader is now unlocked.

If You Get DA Errors

Some Poco C75 builds require a custom DA (Download Agent).

python mtk.py --loader custom_da.bin da seccfg unlock

(Replace custom_da.bin with the DA that matches your chipset.)

Step 4: Extract Stock Boot Image

From the original Stock ROM:

Extract boot.img
Copy it to your PC
Transfer it to the phone storage

Step 5: Patch Boot Image With Magisk

Install Magisk on the phone
Open Magisk → Install
Select Patch a file
Choose boot.img
Magisk will generate:

Copy the patched image back to your PC.

Step 6: Flash Patched Boot Image

Now write the patched boot back to the device:

This replaces the stock boot with a rooted one.

Step 7: Reboot Device

The first boot may take longer than usual. This is normal.

Common Issues & Fixes

Device not detected

Reinstall MediaTek drivers
Use a USB 2.0 port if possible

DA handshake failed

Use --loader with a compatible custom DA