This Device Is Locked Due To An Overdue Installment Payment Xiaomi Exclusive Verified -

The "This device is locked" screen on Xiaomi devices due to an overdue installment is a security feature managed through Xiaomi Finance or third-party lenders. It effectively renders the phone a "brick" until the financial obligation is met.  Core Locking Mechanisms 

Check the Installment Plan Details:

The Experience: The phone's interface is replaced by a permanent full-screen notification stating that the device is locked due to non-payment. The "This device is locked" screen on Xiaomi

• Check your purchase receipt or email.
• Look for IMEI number (on the box or dial *#06# if the dialer works).
• Contact Xiaomi Support via Mi Community with your IMEI. They will tell you the financing partner (e.g., "This IMEI is tied to LazyPay").