Ever since the iPhone debuted in 2007, Microsoft has struggled to adapt to the quickly changing smartphone world--and company Chairman Bill Gates knows it. "There's a lot of things, like cellphones, where we didn't get out in the lead very early," Gates said in an interview with Charlie Rose that recently aired on CBS This Morning. "We didn't miss cellphones, but the way we went about it didn't allow us to get the leadership. So it's clearly a mistake."Related StoriesCan Gmail and Yahoo fend off Outlook.com?Apple releases Java update and malware removal too
