App is bound to the second mobile phone. How to unbind it?

The extreme app binds the second mobile phone and unbinds it:

1, AliPay App- search box search certificate.

2. Click on the Internet account query portal in the search results.

3. Internet account inquiry page: 1. Fill in personal information (mobile phone number, 6 digits after ID number, verification code). 2. Check the Internet platform to query. 3. Click Query and wait for the query result.

4. You will receive the SMS notification of the inquiry result from the Ministry of Industry and Information Technology later.

5. Re-enter the Alipay applet-Internet account inquiry page of "One Certificate Enquiry": click on the Unbinding and Detailed Explanation Portal (click here).