: Enable "Developer Options" by tapping the MIUI/HyperOS Version 7 times in Settings > About Phone .
Xiaomi often limits the number of daily unlocks. If you encounter a "quota reached" error, you can use automation. Unlocking Bootloaders - postmarketOS Wiki
Standard firehose loaders reject the unlock command. You need a "dirty" or engineering firehose. Download the EDL firehose for your exact chipset (e.g., sm8150 for SD855, sm8250 for SD865). These files are circulated in Russian forums (4pda) and Telegram groups labeled "Xiaomi Auth Bypass".
: As of January 1, 2025, users are restricted to unlocking only one device per year . Top "Extra Quality" Bypass Methods for Snapdragon Devices
“Xiaomi doesn’t check the server. They check the qualification file . It’s stored locally after the first attempt. You inject the ‘extra quality’ key—the engineering CID. It tells the tool your device is a pre-production unit. No wait. No server handshake.”
Ironically, a tool called mtkclient (designed for MediaTek) has a side-module for Snapdragon called edl_client . This is an open-source Python script that communicates with the 9008 port.
: For older Snapdragon devices (like the Mi A3), specific batch scripts can sometimes trigger an immediate "unlock critical" command while in Fastboot, completely skipping the server check. XiaoMiTool V2
