Unreliable one-time PIN delivery As part of Kakao’s registration process, new users are required to verify their identity using two-factor authentication (2FA). Initially, Kakao used a domestic SMS provider to deliver one-time PINs (OTPs). Their new customers were experiencing delayed PIN deliveries, or even completely unsuccessful ones. The OTP delivery issues negatively impacted Kakao’s new customers due to many … Continue reading Kakao: Increasing New User Conversion Rate to More than 90% with Reliable One-Time PIN Delivery