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With this "Scheduled Ride" feature of Uber, you will only see the plate number and the driver information when Uber successfully assigned an Uber (driver) to pick you up on your schedule. At this point, your request is still on queue or on schedule and few minutes before the scheduled pickup, Uber will broadcast your request so that nearby Uber driver can attend to your request. And by that time, when a driver successfully accepted your ride request, is the only time that you will see the driver and car information on your phone.
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