What should I do if I forget to change the number that was previously bound to qq?

1. Log in to QQ and enter QQ Security Center through the main menu of QQ panel.

2. After entering the QQ Security Center, you can view the bound mobile phone number. If the mobile phone number is still in use, it can be done by mobile phone verification (if the mobile phone number is not used or lost, it can be done by verifying security issues).

3. Click "Secret Phone" under the secret toolbar.

4. Enter the password-protected mobile phone settings page, and click Replace password-protected mobile phone.

5. Choose to replace it with a secret protection tool (if you have other tools, you can try other options on the left).

6. If the secret mobile phone found in the second step is still in use, you can verify it by SMS, click "Get Verification Code", fill it in after the mobile phone receives the verification code, and click Verify.

7. If the mobile phone has been lost or replaced and is no longer used, you can select the secret protection question through "Can't detect it, change it" below, fill in the secret protection question, and then click Verify.

8. Enter a new mobile phone number and click to get the verification code. After entering the verification code, click OK to unbind and rebind the phone.