Microsoft, Oracle, Nokia and 14 other firms have filed a complaint as a group with the European Commission that Google uses Android to push its own applications, including YouTube and Google Maps, the BBC reported Tuesday.
In the complaint the group, calling itself FairSearch, has characterized Google's Android operating system as a "Trojan horse" that, although offered to device makers for free, requires them "to pre-load an entire suite of Google mobile services and to give them prominent default placement on the phone."
Android is currently the dominant mobile operating system with around 70 percent of the mobile market, research firm Gartner reported.
"We are asking the commission to move quickly and decisively to protect competition and innovation in this critical market," Thomas Vinje of Brussels, counsel for FairSearch, said.
In response to the complaint, Google issued a statement saying "We continue to work cooperatively with the European Commission."