Bill Gates on Monday said his biggest regret in life is Googleís triumph over his company Microsoft in the mobile segment. In a recent interview at Village Global, the Microsoft co-founder revealed that his greatest mistake ever was Microsoft missing the Android opportunity, CNET reported. He said that his mismanagement "caused Microsoft to not be what Android is - a non-Apple phone platform." Google's initial focus when it acquired Android back in 2005 was to beat Microsoft's early Windows Mobile efforts. Ultimately, Android suppressed Windows Mobile and Windows Phone.