Paying With Your Smartphone, Not So Smart

Imagine using your smartphone as your wallet. Google, Mastercard and Citibank recently teamed up to launch tap-to-pay trials in San Francisco and New York. The idea is to use coupons, a store's reward card or pay for your groceries with just a few taps on your phone. Tell Me More's personal finance contributor Alvin Hall talks about the pros and cons of "smartphone wallets."