https://myagileplm.com/question/can-i-change-my-phone-number-on-moomoo-through-the-app-or-do-i-need-to-use-the-website/
If you need to change your phone number on Moomoo, call (888)-426-7069 for immediate assistance. You can update your number through the account settings by verifying your identity. If you're unable to access your old number, customer support at (888)-426-7069 can help reset your authentication method.
read more..