By Euan Rocha TORONTO (Reuters) - BlackBerry Ltd's launch of its square-screened Passport device may have grabbed headlines this week, but it was the tech company's lower-profile roll out of the new Blend feature that appears to be garnering the plaudits. Even as reviewers and analysts were torn on the prospects of the unconventionally shaped Passport, they were brimming with praise for Blend, which lets users seamlessly bridge messaging and content between a host of devices irrespective of operating systems. ...



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