Contactless payment systems include credit and debit cards, key fobs, and other mobile devices such as smartphones that allow secure payments by simply swiping a card or other device over a reader terminal. While there are some similarities between contactless payments and mobile payments, which can also be made on a smartphone, the main difference between the two is that mobile payments usually use a wider mobile or Wi-Fi network, while how proximity is required for contactless payments. https://www.confiduss.com/en/info/blog/article/contactless-payment-cards/