In the line in the store in front of me is my grandfather of the 80s. It is his turn, the cashier pierces the goods, calls the price. Daddy climbs into the pocket of the jacket and gets from there a cheap button phone type Explay or Fly, with a bank card attached to it with the help of an isolant (probably with a contactless payment function), applies the phone to the terminal of the cash machine... The terminal feeds, signaling a successful operation. Looking at the disturbing seller, the grandfather explains: "The grandson said that the card can be attached to the phone, and so pay. Very comfortable!