Google (GOOG) shares are down while Bloomberg reports that the Internet company plans to start testing a service that lets users ring up purchases using their phones. Citing two people familiar with the deal, the report says that the company will pay for installation of thousands of specialized cash register systems from VeriFone (PAY). The trial will take place in New York and San Francisco within four months. Google shares are down 0.96%, or $5.49, to $564.29.