Once the top of the range of smartphones, BlackBerry saw its share value plunge 75 per cent in 2011 because of international service outages coupled with stiff competition from Apple's iPhone and Google's Android.

Now, the two founding CEOs of Research in Motion which makes the popular mobile products have stepped down to make way for Thorstein Heins, another member of the company's leadership team for more than five years, in a bid to refresh and re-energise the company.

Al Jazeera's Daniel Lak reports from Waterloo, Canada.

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