By Euan Rocha TORONTO (Reuters) - BlackBerry Ltd's strategy for serving big clients like corporations and government agencies will take shape on Thursday as it launches a new mobile device management platform, a vital component of its turnaround plan. At a San Francisco event, BlackBerry will outline tie-ups with carriers and service providers that will be co-marketing the BlackBerry Enterprise platform, or BES 12, according to industry sources. Analysts and investors are watching closely to see if BlackBerry Chief Executive Officer John Chen can kick-start revenue growth. ...



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