I stuck this in the Android forum since I am not aware of any IOS devices that have NFC and this technology will use NFC.
Of the Android devices I aware of that have NFC, I can think of the Nexus S, Galaxy Nexus, Samsung Galaxy S2(?) and possibly some of the newer phones coming out like the HTC One.
As an aside my daughter has a Nexus S in the US on T-Mobile. But the Google Wallet app is only available on ATT. I have suggested to her she borrows an ATT SIM, logs onto the Play Store to get the app and then put her T-Mobile SIM back. She should then be able to register for Google Wallet and use it. There are quite a few department and clothing store chains that accept Google Wallet so it would be useful for her.