Made a purchase. Saw the message about 3DS. Had no idea what to do next. Card was declined. Transaction failed.
As instructed on the merchant screen, I had opened my curve app but there was nothing obvious to do there.
After it failed I realised that I should have got some kind of notification, but must have missed it.
Have now read this…hope to have better luck next time. But could 3DS transaction please be more obvious in the app if you don;t get the notification, perhaps added as a button under the current card in your wallet or under the Curve card as an additional option.