Research Competition has expanded to include mobile search, where Google and Apple divide $ 1.3 billion in revenues in 2011

an antitrust investigation in the U.S. Apple sued Google for more information on the agreement by which the search giant offers for the iPhone and the iPad, Bloomberg said, citing sources in within the Federal Trade Commission, which is investigating.

The Federal Trade Commission began investigating Google's position in the search market in the U.S. last year to determine if unfairly increase advertising rates for competitors, and if your results research are biased in favor of their own companies - such as rapid growth of social networks on Google +.

U.S. authorities have demanded that Apple ships with the agreements that Google is the default search engine and maps on their mobile devices. According to Bloomberg, other mobile phone manufacturers and mobile phone networks were also cited.

rivals Google, Microsoft, called the anti-competitive agreements. Overall, Apple devices and mobile phones running the Android mobile operating system to give Google market share of more than 75% mobile market in the U.S. today, more than they have in the desktop area, where their share is 66.4%, according to ComScore. In Europe, where the European Commission is also conducting an antitrust investigation into the company, from Google Desktop is about 90%. It is unclear whether the European Commission is also looking much Google and Apple, despite a decision on its investigation is due next month.

The details of the relationship between Apple, Google can display if it abuses its dominant position in research to increase revenues in the mobile advertising market, Allen Grunes, a competition lawyer Brownstein Hyatt Farber Schreck in Washington, told Bloomberg. "As mobile search becomes more widespread, the default becomes more important," said Grunes, is not Google and its rivals.

Google was the default search engine on mobile devices from Apple since the iPhone was introduced in 2007, although Apple is believed to have continued discussions with Microsoft in 2010 to use its search engine Bing in place. However, Google has terminated the continuing contract means Apple and Google to share advertising revenue from Google searches on the iPhone and iPod Touch, and iPhone

subpoena from the FTC is the latest twist in the relationship between Google and Apple. The two companies were linked to most of the last decade, Google, Eric Schmidt, chairman of the board serve for Apple. But that changed in 2008 when Google announced it would introduce Android to compete with the iPhone.
Schmidt left the board in 2009, the same year, the FTC said it was examining whether Apple and Google were violating antitrust laws of the board to share. Schmidt, then chief executive of Google, said the investigation of the FTC's decision to resign from Apple board.