Before China Eastern Airlines Futures, the mobile phone number was not needed. The replacement method is as follows:

1. Log in to China Eastern Airlines Futures official website and enter the personal account page;

2. On the personal account page, find relevant options such as "account settings" or "personal information" and click enter;

3. On the account setting or personal information page, find the related options such as "contact information" or "mobile phone number" and click "modify" or "replace";

4. Enter a new mobile phone number and verify it, and proceed to the next step according to the system prompt;

5. Remember to save and update personal information in time after completing the replacement of mobile phone number.