The United States Department of Justice, joined by 16 state and district attorneys general, has filed a civil antitrust lawsuit against Apple for monopolization or attempted monopolization of smartphone markets in violation of Section 2 of the Sherman Act. You can read the full text of the filling here (fave.co/43J0PTp).
The government alleges that Apple used contractual restrictions and technological restrictions to limit developers in such a way that it is more difficult
