Digital Trends – Thereâs been a lot of buzz around near-field communication (NFC) revolutionizing the way we pay for things by turning your mobile phone into a mobile wallet or mobile payment device. The problem is that only a few phones, such as the Google Nexus S or Nokiaâs Astound, have the specialized chip built in them. A company called Naratte has found a way around the problem by using ultrasound tones and your phones existing microphone and speaker to do the same thing as NFC but less exclusive.