Whether you were trying to relock the bootloader, flashed the wrong super image, or the phone simply decided to enter EDL mode (900E) after a crash, you’ve hit the wall. The official Mi Flash tool spits out the error: “.”

Once replaced, you hit "Flash" and hope the bypassed authentication holds. Current State of the Community

They might simply fail to authenticate (returning a "NAK" error).

Xiaomi implements a security layer within its modern EDL configurations.

Have you successfully unbricked your Poco X3 Pro using a patched Firehose? Share your experience in the comments below. If you found this guide useful, bookmark it and share it with the community.

: The device may return a NAK (Negative Acknowledgment) or "signature verification error".

If you have acquired your verified firehose file and are ready to flash your device (often to fix a "deadboot" or hard brick), here is the standard workflow using open-source tools: Step 1: Install Qualcomm Drivers

You cannot simply use any firehose file. Using the wrong one can permanently brick your phone.