1. Open a webpage about your education in the browser, log in to your account, find "Know your education" in the upper left corner of the page, and click enter.

2. Locate the "Personal Center" status bar on the right side of the page, and then click Enter.

3. Find the "Personal Information" option in the jumped page, and click Enter.

4. Find the "Modify Binding" button in the personal information page, and then click Select.

5. In the modify binding interface, enter a new mobile phone number and click "Get Verification Code" to get the verification code.

6. Enter the received verification code and click OK.

7. You will be prompted to confirm whether to change the bound mobile phone number, and click OK to complete the unbinding operation of the original mobile phone number.