What I can’t figure out is why the old readers, which clearly read NFC cards, can’t work to read iPhones, which emit NFC.

I understood in the past that iPhones weren’t supported because of the limitations described in the article. I figured once Apple opened up the system and Ubiquiti actually implemented it (both of which have now happened) that the old readers would work.

Although irritating, I’d consider paying $5/user/year, but I’m not about to rip out 6 card readers that I just installed.