We're enhancing the way you approve your online card transactions to provide you with greater security and convenience. As part of this upgrade, SMS OTP is no longer supported. Once registered, you'll receive in-app authorization requests to approve your online purchases. Starting July 2025, this change will be rolled out in phases. To ensure uninterrupted access, please download the 'Citibank UAE' app from the App Store or Play Store and complete your registration.