Enable on your phone (Settings > About Phone > Tap 'MIUI Version' 7 times > Additional Settings > Developer Options > USB Debugging). Connect your phone to your PC via a USB cable.

Fastboot Mode , follow these steps: Turn Off the Device : Press and hold the Power button Volume Up button simultaneously to fully power down the smartphone. Enter Fastboot Mode : Once the device is off, press and hold the Power button Volume Up button at the same time until the Fastboot screen appears.

Use this method if the phone is functional and USB debugging is enabled.

, you must use a specific hardware button combination while the device is powered off. Power Off : Completely turn off your by pressing the Power and Volume Up buttons simultaneously.

Once in Fastboot mode, you can verify the connection from a PC using:

Note: While many Redmi devices use Power + Volume Down, specific guides for the A3x model indicate the key is used for this specific variant. Release Buttons