The commission said that it had notified Google of its key concerns in its antitrust investigation into the company's Android operating system. Vestager's office flagged up issues with licensing of Google's proprietary apps; a deal which prevents OEMs from selling devices running on Android forks; and exclusivity arrangements relating to pre-installs of Google's search service.
The EU's competition officials have been separately carrying out a number of other investigations into Google's business practices in Europe. In April 2015, Vestager charged Google based on allegations that it was "systematically favouring its own comparison shopping product in its general search results pages."
On that particular case, Vestager said on Wednesday that the commission was poring over a "detailed response" from Google, and it was "currently in the process of analysing the very large amount of data" it had received.