Blackberry pins hopes on new BB10 smartphone
30 January 2013 Last updated at 11:55 GMT
After a year in which it lost its grip on the business smartphone market, Blackberry seeks to bounce back with the BB10.
The company's European MD Stephen Bates was pushed hard by BBC Radio 5 live Breakfast on what went wrong for the company Research in Motion.
Earlier Mr Bates had faced a similar grilling from BBC's Breakfast Steph McGovern