No Android Pay With Unlocked Bootloader?

Install play services 8.1 and Android Pay.

http://www.apkmirror.com/apk/google-...-apk-download/
https://www.apkmirror.com/apk/google...-apk-download/

I cannot get the Android Pay to work, even with doing a full unroot. I still get an 'not supported' error. See here https://m.reddit.com/r/nexus6/commen..._work_with_an/