BRIEF-Blackberry CEO says 2/3s to 3/4s of shipped BlackBerry 10 devices sold
TORONTO, March 28 (Reuters) -
* BlackBerry CEO says two-thirds to three-quarters of shipped
BlackBerry 10 devices have already been sold
* BlackBerry CEO says expects a single digit decline in services revenue in current quarter
* BlackBerry CEO says older devices are still selling strongly in regions such as Latin America
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