Call with a reasonable reason for needing the Freedom card also.
Maybe: you fly United a lot, but also want the opportunity to earn UR points.
OR you want to keep different expenses separate from each other, so you''ll charge them to different cards.
Not to worry, they're unlikely to recind your United approval.
[You can edit your post if you click on "modify" at the top right of the post's box within 3 hours of having written it. ]