1. Enter the to-do list, select the corresponding login method, and log in to the to-do list.
2. After successfully logging into the to-do account, go to the to-do home page and click my avatar in the lower right corner.
3. Enter my, find personalization and settings, and click the settings below to enter.
4. Enter Settings, find the following account and security, and click Account and Security to enter.
5. Enter the account number and security, find the following mobile phone number, and click the mobile phone number to enter.
6. Enter the mobile phone binding, enter the mobile phone number that the relevant individual needs to verify, and click the binding below to complete.