https://support.dhigroup.com/forums/general-discussion/f3134c58-27f4-ef11-a4dd-6045bd9e8402
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.
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