If the registered number is no longer active, you can submit an unlock application to Xiaomi’s support team with proof of purchase to have the lock manually removed. Technical Bypass for MIUI V12.5.1.0

with MIUI version involves several specialized recovery methods. Whether you have access to the registered recovery information or need to use technical tools for a bypass, the process is structured to ensure security or restoration. Official Recovery Methods

For cases where official recovery is impossible, specialized firmware files and tools are often used to bypass the Mi Account lock on the model.

Visit the Xiaomi Account login and select "Forgot Password" to receive a reset link via your registered phone number or email.