Problems with the Blackberry smartphone system have entered a third day, meaning no service for many users.
The bug that struck millions of users in Europe, the Middle East and Africa has now spread to North America, cutting them off from emails, web browsing and the Blackberry messaging service.
Research in Motion, or RIM owns Blackberry, and its UK managing director Stephen Bates says its engineers are working around the clock to fix the problem and there has been some improvement in business and consumer emails through the system, but they are not out of the woods yet.
RIM's share price has tumbled this year, and a top investor in RIM, Victor Alboini at Jaguar Financial, says management had not been doing their job in meeting the market's needs.
He says it may be time to consider selling the company and questions whether the company can survive in terms of research and development saying it may be better to merge with somebody like Microsoft.
Mr Alboini says he's canvassing support among institutional investors for his plans.