In most cases, unlocking the bootloader voids your manufacturer warranty.

Look for "patched" versions of the Mi Flash Unlock tool on forums like XDA Developers. These community-made versions sometimes bypass the "Insert SIM" check on the PC side. Method 3: Google Pixel and OnePlus Devices

Connect to a PC and use the command: fastboot flashing unlock or fastboot oem unlock . Method 4: Using Mediatek (MTK) Client Tools

Most brands, especially Xiaomi (Mi/Redmi/Poco), require a SIM card for two reasons:

It bypasses account verification, SIM requirements, and waiting periods.

This tool exploits vulnerabilities in the chipset’s boot ROM.

Toggle . (If this is greyed out, you may need to factory reset and connect to Wi-Fi again without signing into a Google account). Boot into Fastboot Mode (Power + Volume Down).

To bind your Mi Account to the hardware via cellular data. Method 1: Using a Temporary SIM (The Most Reliable Way)