Quick question...The only ones I changed are the model, name, device, and product. So it's one or more of those that prevents Wallet from working. It's not a bug. Wallet is not supposed to work on the AT&T S4. The only options are to make Wallet think you have a supported phone like the Sprint S4 or use Nottach or other app to mod Wallet to bypass the check.
If/When Google wants to push a OTA via the settings menu (4.3 update for example), what exactly happens? Will it never find the update? Or will it find the update but always fail?