How can a business finds out if a mobile number is registered on KakaoTalk?

Donna_M — Tue, 31 Jan 2023 09:22:51 GMT

KakaoTalk is a messaging app that is widely used in South Korea. When you have a business registered in South Korea, a business can register a KakaoTalk Business Channel which will allow the business to send both notification or advertisement messages to their customers on the KakaoTalk messaging app.

When a user has given the business their mobile number, it's possible to try and send a message to the user on KakaoTalk, for example, a welcome message. If the user is not registered on KakaoTalk, it can fallback to SMS so the business will reach them in any case.

The business can also receive a delivery receipt by subscribe the callback trigger - MESSAGE DELIVERY from the Conversation API and a reason will be sent if it failed to deliver:

"reason": { "code": "BAD_REQUEST", "description": "The underlying channel reported: 3008: Phone number error", "sub_code": "UNSPECIFIED_SUB_CODE" },

If an advertisement message is sent and the user is not a "friend" to the KakaoTalk Business Channel then a reason will return as below:

"reason": { "code": "CHANNEL_REJECT", "description": "The underlying channel reported: 3018: Unable to send messages (invalid or broken KakaoTalk user)", "sub_code": "UNSPECIFIED_SUB_CODE" },

Learn more

Find out more about the Sinch KakaoTalk for Business channel.
Sinch Developer Documentation site contains comprehensive documentation and tutorials, which show you how we support KakaoTalk using the Sinch Conversation API.

article How can a business finds out if a mobile number is registered on KakaoTalk? in KakaoTalk

How can a business finds out if a mobile number is registered on KakaoTalk?