By Euan Rocha TORONTO (Reuters) - BlackBerry is set to launch an unconventional new smartphone dubbed the Passport on Wednesday, as it embarks on potentially the most critical phase of its long turnaround. The one-time smartphone industry pioneer recently concluded a three-year long restructuring process and has largely halted the bleed, but it is now up to Chief Executive John Chen to prove that the company's new devices and services are capable of generating sustainable new streams of revenue and returning it to profitability. "BlackBerry is still fighting for survival. ...



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