Hey,
I have a question again. Many questions arise if you are working with Arduino for 5 days a week (internship). 
For a next project I started working with NFC. I'm using an adafruit PN532 NFC shield. Data writing to a chip / card was not a problem. This chip / card can also be read with the shield and smartphone.
But now I want the following. I want to keep my smartphone against the shield and then read the data. I can not find so much about this and wondered if this was possible and whether anyone has experience with it?
I am looking forwared to your ideas and knowledge! 