The European Commission (EC) has issued its statement of objections over the way Google runs its Android operating system, claiming it is unfairly promoting its own services within the platform at the expense of others in the market.
The objections had been expected for some time, and follow on from objections raised by the EU over Google's search practices, issued around the same time last year.
The decision is based on two key issues that the EU has with how Android is supplied to the market.
"First, the practices mean that Google Search is pre-installed and set as the default, or exclusive, search service on most Android devices sold in Europe," the EC said.
This refers to the fact that Google-owned services such as YouTube, Chrome or Google Search have to be supplied with Android by manufacturing as part of the license to the use the platform.
"Sceond, the practices appear to close off ways for rival search engines to access the market, via competing mobile browsers and operating systems," added the EC.
Commissioner Margrethe Vestager, in charge of competition policy, said given how important mobile devices are now, those supplying the operating systems need to be held accountable for how they operate.
"We believe that Google's behaviour denies consumers a wider choice of mobile apps and services and stands in the way of innovation by other players, in breach of EU antitrust rules"
In response Google's general counsel, Kent Walker, said it tooks the concerns raised "seriously" but also laid out reasons why it things the Android model - that allows firms to use the code free of charge - is best for everyone.
"Manufacturers who want to participate in the Android ecosystem commit to test and certify that their devices will support Android apps. Without this system, apps wouldn’t work from one Android device to the next," he said.
"Imagine how frustrating it would be if an app you downloaded on one Android phone didn’t also work on your replacement Android phone from the same manufacturer.
He also noted that manufacturers are free to add other services, such as from Facebook, or Amazon, to their phones as well as the Google apps
He also said that providing Google services with Android was what helped Google offer the platform for free.
"We provide Android for free, and offset our costs through the revenue we generate on our Google apps and services we distribute via Android."
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