I thought ATT version of iPad would work on TMO too. Unlike phone, iPad is not unlocked to carriers. Pls don't hold me responsible as I've not verified it myself.
Credit card companies live on transaction commission while Google makes money from target Ads. Who would mess up with their main business? I know banks go through my profile to gather statistics, but as least I trust them to some extends, given the fact their business model has been running for hundreds of years and it's not advertising. With searchs, locations and social updates on hands, Google gets so deep in normal people's privacy. NFC could become a significant player in mobile payment, but I won't choose Google's offering. I doubt Google wallet would end up with the same fate as Google Checkout.