You gotta love U.S carriers. They are notably insane for locking bootloaders, adding bloatware, advertising, and essentially ruining your device. And that is basically what happened to the Galaxy S III, U.S version.
In the U.S, multiple carriers have blocked the ability to use Google Wallet. Now NFC is cool and all, but when I think Near Field Communication, I think of sharing data to another device, or Google Wallet. And quite frankly, why would a carrier rid of such a useful application?
In any event, some fella’s over at XDA Developers Forums have given U.S Galaxy S III users a chance to use the freedom of Google’s NFC capable payment method.
I wont go into the whole process here, but you just need to have “root” to begin with, and have the stability and confidence to edit some “build files”. The method can be found here.
It is pretty simple, and as long as you make “Nandroid” backups you should be fine. Happy Google Wallet-ing!