BlackBerry kicked off its comeback efforts earlier this year when it launched the new BlackBerry Z10 smartphone, and the charge continued last month as the BlackBerry Q10 began rolling out. But while low-end and mid-range smartphones had played the biggest role in keeping BlackBerry alive as it readied its next-generation BlackBerry 10 smartphones, both of these new handsets were expensive high-end models. A number of industry watchers feared that the high-end smartphone market was already cluttered enough and BlackBerry should instead focus on its bread and butter, and a new leak suggests it might finally be ready to add a cheaper handset to its new device lineup. Images of the BlackBerry R10 first leaked early last month, and now the

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