There's a chance all the new iPhone's have NFC, for this purpose. The Plastic and the Metal models.
However; considering Apple's previous stance, and this statement from the article suggests otherwise
Isis is going to support Passbook.
However; considering Apple's previous stance, and this statement from the article suggests otherwise
By working on the iPhone, Isis is indicating that it’s expanding beyond a technology called near-field communication (NFC), which hasn’t taken off as expected.
Isis is going to support Passbook.