use near field communication (NFC), similar to Bluetooth, data transfer requires close proximity & offers greater security. This includes payments from your mobile phone such as Apple Pay on your iphone & Google Pay on android.
Mobile
Contactless Mobile Payments
make it possible for businesses to authorize a credit card transaction without using a credit card reader and having to physically swipe or dip a card.
Mobile or Wireless Credit Card Readers,
work much like a traditional credit card terminal and operate on Wi-Fi to accept credit card payments.
In-app mobile payments
with stores and businesses that allow them to buy select products and services within closed ecosystems.
Mobile browser-based
contactless payment allows users enter credit card information to make card-not-present purchases.