The United States continues to resist Google's search and advertising clout.

The Justice Department has begun interviewing a former Google official about multibillion-dollar transactions with mobile operators and others.

According to Chris Barton, who worked at Google from 2004 to 2011, the firm was fast to recognise the benefits of individuals utilising Google search.

"As we recognized the opportunity for search on mobile phones we began to build a product team," he said.

According to Barton's LinkedIn profile, he was in charge of overseeing Google's alliances with mobile providers including Verizon and AT&T, and he predicted that the arrangements will be worth around $1.5 billion.

The government claims that Alphabet's Google (GOOGL.O) paid cellphone providers $10 billion annually.

Dintzer added that Google rigged online ad auctions to drive up rates for advertisers. Google earns its money through advertising because searching is free.

Hal Varian, a Google economist, was the first witness for the government on Tuesday. He was questioned about internal corporate talks regarding the value of scale and Google's potential