Please check the following
If you have Kakao Talk:
1. Is the app working properly?
If you do not have Kakao Talk:
1. When did you erase Kakao Talk?
2. Did the verification SMS go to spam folder?
By default, GDAC's log in verification message is sent through Kakao Talk app.
If you do not have the app on your phone, SMS is sent instead.
If you have Kakao Talk and you are not receiving verification messages,
Please use the below form to make an inquiry.
[Log in verification message inquiry form]