Media playback is unsupported on your device

RIM to unveil new Blackberry

20 August 2012 Last updated at 07:30 BST

It could be a make or break week for Research in Motion, the company that makes the Blackberry mobile phone.

The Canadian company will unveil a new version of the Blackberry to telecom companies on Monday, hoping it will be a winner with their customers, and create enough new sales to revive its fortunes.

Russell Padmore reports.