Google have already tie up with Citibank, MasterCard, First data and Sprint.
You don’t need to enter a PIN NUMBER which you use to do while making the payments. Just all you need to do is take special care of your phone.
This service uses NEAR FIELD COMMUNICATION (NFC), which is known for short range wireless communication system. It will allow users to pay for all those things which you buy from the retail stores, restaurant bills, electricity bills, mobile bills many more.
Google have already tie up with Citigroup and MasterCard for this service. Google Payments already working as midiater for making payments with wireless carriers.