What Is NFC And How It Works?


Near Field Communication (NFC), a contactless communication technology which allows a smartphone or tablet to communicate with other device through radio waves. NFC as the name suggests, it allows short range communication between the two NFC compatible devices. This fast and handy technology is already popular in Asian and European countries and is now quickly spreading throughout the United States.

How It Works?

So how it works? Like Wi-Fi and Bluetooth, NFC send the information via radio waves. This contactless communication technology is based on RFID (Radio-frequency identification) concept, which uses electromagnetic induction to transmit the information. This is the main difference between the other wireless technologies and NFC.

NFC devices mainly support 3 main modes of operation: 

  • Peer-To-Peer Mode: it allows the NFC devices to exchange data with other NFC peers; this operation mode is used by Android Beam.
  • Reader/Writer Mode: it allows the NFC device to read or/and write passive NFC tags and stickers.
  • Card Emulation Mode: it allows the NFC device itself to act as an NFC card. The emulated NFC card can then be accessed by an external NFC reader, such as an NFC point-of-sale terminal.


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