BlackBerry's new chief executive cast off persistent talk of the smartphone maker's demise, vowing on Monday that the company would pick itself back up and was "here to stay." "Reports of our death are greatly exaggerated," John Chen, who was appointed interim chief executive last month, said in an open letter to customers. The Waterloo, Ontario-based company helped create a culture of mobile users glued to smartphones, but lost its luster as many moved to iPhones or devices using Google's Android software. BlackBerry still has some 70 million subscribers worldwide, but most of these are using older handsets, with newer devices on the BlackBerry 10 platform failing to gain traction.



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