According to a report from Seeking Alpha (via  Financial Times), Apple is being investigated by the European Commission over anti-competitive sales tactic in relation to their iPhone.
The investigation is a result of several complaints received by Brussel, highlighting this alleged anti-competitive sales practices by Apple.
According to the report:
The European Commission has launched an informal, preliminary inquiry into whether the company compels operators to accept terms which ensure it always gets at least as good a deal in terms of subsidies as competitors. A nine-page questionnaire sent to telecoms also asks about minimum purchase requirements and sales terms, FT reports. AAPL says it is in full compliance with all applicable laws.
Source:Â Seeking Alpha