What is the use of qq device lock?

QQ device lock can effectively protect the security of QQ account. When you unlock the mobile QQ device, you need to verify the original bound mobile phone number before you can log in to QQ on a strange computer or mobile phone, which can effectively prevent strangers from logging in to our QQ on a strange device after the QQ password is accidentally leaked.

To unlock the QQ device lock:

Log in to QQ and click on the avatar in the upper left corner.

Then select the settings in the lower left corner.

Click Account and Device Security.

Then click the device lock.

Then turn on protection.