Google is releasing the first version of its Google Wallet app to Sprint Nexus S 4G phones and offering a $10 free bonus to users who sign up before the end of the year.

NEW YORK – Google is marking its territory in the mobile commerce space by partnering with Citi, MasterCard, First Data and Sprint to unveil a new mobile wallet that not only lets consumers store all of their cards on one single device, but pay for goods and services via one tap.

Citi Cards has rolled out several mobile services to save time and money for its on-the-go customers.