If you purchased a pass via the Citi Bike mobile app, or you're an annual member who has chosen to use mobile ride codes instead of a bike key, you can unlock bikes directly from the app. Open up the Citi Bike mobile app, tap the closest station market, and tap "Unlock a bike." A 5-digit ride code will appear – enter it into the keypad on the dock next to an available bike to unlock it.
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