Why do I need my previous phone number when I log in with my Kakao account or try to find my password?
We ask for your previously-verified phone number in order to prevent other people from logging in with your Kakao account.
If you have forgotten your previous phone number, you cannot log in with your Kakao account and your previous KakaoTalk data, including your friends list and KakaoTalk ID, cannot be restored.
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