Please confirm whether you have successfully bound your mobile number. For details, please refer to the MaiCoin Identity Verification.
Please note that the number of times you can perform two-factor authentication via SMS is limited to 20 times per day. If the SMS verification has reached the daily limit, you will not be able to change the verification method and will not be able to withdraw cryptocurrency.
For users who need to withdraw cryptocurrency frequently, it is recommended to use Google Authenticator or Authy as your two-factor authentication tool, as they do not have a daily limit.
Please be reminded that the withdrawal function will be temporarily suspended for 24 hours within changing your two-factor authentication tool.