It's a technology for radio communication between two devices for a short distance. It is used electromagnetic induction between two loop antennas for data transmission like RFID cards. This technology is working on frequency 13.56 MHz.
Whilst Apple is beginning to open up NFC capabilities of iOS to third parties, it currently allows only certain applications (Apple Wallet, Apple Pay and CarKey) to work with NFC via a Secure Element (SE).
Third-party physical access control apps like 2N® Mobile Key typically use Host Card Emulation (HCE), which Apple still doesn't support.
Set up in your phone
Please ensure that your phone has NFC activated:
Set up in the intercom or access unit
NFC is used for exchanging information between two devices for a short distance. It is possible to use this technology instead of RFID cards. This identification is provided by the unique code of the end devices that contain this technology, like almost every smartphone these days. There is a communication between smartphone and 2N and 2N IP Intercom equipped with 13.56MHz RFID card reader. It means that you can use 2N® IP Verso or 2N® IP Force. NFC application can also communicate with our new 2N® Access Unit. Right SmartCard reader is needed on the side of 2N IP Intercom (or access unit) and this unit has to be equipped by extended NFC licence (order number 9137915).
The smartphone which has NFC technology implemented has to support also HCE technology. 2N® Mobile Key serves as the platform for NFC communication and must also support HCE (Host Card Emulation) technology. This application can be found and downloaded for free from Google Play. It is required to enable the NFC technology and launch the application. You can see the following picture after launching and you can close this application. This application will be running in the background until reboot and provide communication if needed.