iPhone 4 unveiled Summary: Apple CEO, Steve Jobs introduces iPhone 4 at the company¹s World WideDevelopers Conference in San Francisco. Features include a new glass andsteel design, a built in antenna and a higher resolution screen. June 7, 2010 -- 12:28 GMT (05:28 PDT) Loading... Please wait. Topics: Smartphones, Hardware, iPhone, Mobility Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.