Discussion
This is a very unsatisfactory answer.
NFC is not common in the US and Europe, yet.
This is discriminatory towards people who don't want or can't afford a phone with NFC capabilities.
Granted, I'm in the US, so I'm not your targeted market, but... This kind of stuff will limit your market with those that could be your most staunch supporters.
Like me.
I know, but unfortunately it is a requirement for us.
You can always borrow your parents/best friend's phone and do the process from his device, and then delete the app
