The next big thing in the evolution of mobile devices seems to be near-field communication, or NFC. This feature allows the user to store financial information on their smartphone or tablet, and then merely tap that device at the checkout register to make an instant purchase. But the feature can't be used if the device doesn't already support the hardware needed for NFC transactions.
Tyfone has developed a system and are now putting NFC chips, controllers, and antenna’s into Micro SD and SD cards. This makes it possible for mobile phones and other PDA like devices to easily add NFC capabilities to their device just by simply changing the SD card they are using. But, the phone additionally needs a special background app to communicate with the NFC circuitry.