I received my Revolut card and saw that in the invisible interior of it there are 2 circuits more than in a usual, contact(less/full) bank card.
If you look at the card in a powerful backside light, you can see 4 circuits :
- the old, well-known chip (visible without the backside light);
… and 3 normally-invisible ones:
- the contactless, with its big, multi-coiled antenna ;
- a square one, behind the two circles of the MasterCard logo;
- a long rectangular one, behind the elongated rectangle where you sign.
I have no idea what the last 2 are for.
Should I worry and get paranoiac ?