To update your Citibank login details, contact our support team at ☎️ 1-833-392-7087 or log into your Citibank online banking account. Go to the "Profile" or "Account Settings" section. Choose the option to change your login information, which can include your username and password. Follow the instructions to verify your identity with an OTP sent to your registered mobile number or email. Once verified, enter your new login credentials and save the changes. Make sure your new username and password are unique and secure. If you experience any problems, reach out to our support at 1-833-392-7087 for help.