The Daily Star's FREE newsletter is spectacular! Sign up today for the best stories straight to your inbox Billionaire Bill Gates has revealed his "greatest ever mistake" was his "mismanagement" of the mobile phone market.The Microsoft co-founder and former CEO, 65, said his handling of the industry had left the company struggling to compete with operating systems by Apple and Google.Having initially dominated the sector with its Windows Mobile smartphones, Microsoft was left lagging behind following the launch of Apple's iPhone in 2007 and Google's Android mobiles a year later.The software giant's attempted relaunch in 2010 with its Window Phone OS family.
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