4.7 You can reach Citi Bike customer service by calling 1-855-245-3310 or through the app's help section.
Go to the app's settings, select "Payment," and enter your new payment details.
To activate your account, follow the link in the confirmation email you received after signing up.
Log in to the app, go to settings, select "Account," and update your email address there.
Open the app, tap "Log In," enter your email and password, then tap "Log In" again.