I used my Citibank card yesterday at a grocery store. The checker told me the total, they always ask credit or debit if you don't offer cash. I said credit and waved the phone near the card reader and ding, Accepted! She looked at me, looked at the phone, looked at me and says "Wait a minute... did you just pay with your phone?" I said yup. She stepped back from the register, turned and walked away a few steps, walked back and said "Serious?" Again I said yup. She turned to the young man bagging and said "Did you just see that?"
Fun with shopping!