According to this reddit thread[1] they were sued for patent infringement[2]<p>[1] <a href="https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;apple&#x2F;comments&#x2F;1xuzif&#x2F;what_ever_happened_to_making_facetime_an_open&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;apple&#x2F;comments&#x2F;1xuzif&#x2F;what_ever_hap...</a><p>[2] <a href="http:&#x2F;&#x2F;www.bbc.com&#x2F;news&#x2F;technology-20236114" rel="nofollow">http:&#x2F;&#x2F;www.bbc.com&#x2F;news&#x2F;technology-20236114</a>