Can John Chen save Canadian smartphone firm Blackberry?

When it comes to the mobile handset industry, a shift in consumers' preferences have led to a change in fortunes for Canada's Blackberry, which has struggled in recent years.

The company recently named a new chief executive, John Chen, to help it turn around its fortunes.

But will that be enough?

Investors should get a clearer picture when the company releases its latest quarterly earnings on Friday.

The BBC's Michelle Fleury looks ahead to the results from New York.