<prompt> Human: Today I got a haircut, never went to the place so this was the first time, I enter the place and this guy assist me, I told him several times how to do the haircut, clearly he doesnt know how, didnt have a clue, but at the end he tell me the price for the service, I tell him where can I paid with the card, when I look at him again he was connecting this strange device to his cellphone, a device to connect a debitcredit card and process the payment and this is very strange, when I saw that I told him that I was going to pay with cash, he even told me Well have a good one after I gave the money to him, and I told him that he owes me the change, he give the money to me and I leave, very upset for two reasons, the hair cut was not ok, he is not professional, the second: what about that device? this is legal? he didnt give me a receipt, what is this? I just want to report him, need some insight about this, thanks.  <response>: Phone credit card readers exist 