How to change the bound mobile phone number of qq?

QQ changes the bound mobile phone number as follows:

Replacement through QQ interface: Open QQ, click on the main menu in the lower left corner of QQ-Security-Home page of Security Center, click on the replacement of secret protected mobile phone, enter the mobile phone number and verification code to be replaced, and send a prompt confirmation code to complete the replacement binding.

Change by SMS: edit the SMS content "QQ number, QQ password" and send it to the access number (for example, the QQ number to be bound is 123456 and the QQ password is ABC, so you can edit the SMS content: 123456, and ABC sends it to 1700 15).

Change through website: enter the binding official website, log in to QQ number, drag to Function Settings at the bottom of the page, click QQ Binding Mobile Phone, enter the mobile phone number to change the binding, click Get Verification Code, enter the verification code received on the mobile phone, and click Confirm Binding to complete the binding change operation.