title: Android : How to change NFC protocol priority?
body: <p>I have my own Android app (App A) which reads and writes NFC tags and ISO-14443 Type A tags. It works well on many Android devices.</p>
  
  <p>I want to give the role of ISO-14443 tag to my Nexus5, so I implemented my own HCE (Host Card Emulation) application (App B) on my Nexus5. When I touch the Nexus5 on an external NFC reader (which uses ISO 14443), it works perfectly.</p>
  
  <p>However, when I touch the Nexus5 (App B) on a Nexus7 (running App A), p2p (Android beam) data exchanging sequences start.</p>
  
  <p>Even after I turn off Android beam functions on both devices, nothing changes. The Nexus7 doesn't display the 'Touched to Beam' screen, but the p2p detect sound plays.</p>
  
  <p>LogCat shows that Nexus7 tries to establish an LLCP connection.</p>
  
  <p>I want that Nexus7 to focus on detecting the ISO-14443 HCE of Nexus5, not Android beam.</p>
  
  <p>How do I change the NFC detection priority to give preference to ISO-14443 over Android beam?</p>