To upgrade from a regular KakaoTalk channel to a Business KakaoTalk channel, you need the following:
The application process will take 3 to 5 days and details will be sent to your registered email.
Upgrade process
To upgrade to the business channel, take the following steps:
Note: If the information displayed on your Channel does not match your documents, it may be rejected. It takes about 3 to 5 working days for approval and details will be sent to your registered email.
For more information, visit the Kakao for business website.