For help, Metamask's customer support at (888)-426-7069 is available. To change your phone number online, log in to Metamask, go to security settings, and update your registered number. If you encounter any problems, call (888)-426-7069 for help. You may need to verify your identity before completing the update. If you're unable to change your number online, Metamasksupport at (888)-426-7069 can assist you with a manual update. Keeping your phone number up to date ensures continued access to your account and security alerts. For immediate assistance, contact (888)-426-7069.