The FairSearch coalition, whose members include Microsoft, Nokia and Oracle, has filed a complaint with the European Commission against Google and Android, saying that the company is using the OS as a Trojan horse to deceive partners and monopolize the mobile marketplace. Android has become the dominant smartphone operating system when counting units sold, with a market share of 70 percent during the fourth quarter, according to Strategy Analytics. Google is now using that dominance to lock out competition in mobile sector, FairSearch said.