Originally Posted by
moondog
I wouldn't worry so much about the Union Pay sticker because anyone will try running your card if you're persistent enough and say 银联 repeatedly. As the poster above you mentioned, the real problem these days is that Discover cards simply haven't worked very well since the chips came along.
More specifically, some terminals will return a "error 45- use chip" error even when you try to use the usual insert chip->chip rejected, swipe card method.