Summary Box: Cause given for BlackBerry troubles

DAY TWO: There continued to be reports of BlackBerry service disruptions in Europe, the Middle East and Africa and fresh problems in Latin America and India. There were no reports of any problems in the U.S.

THE CAUSE: Research in Motion Ltd. says there was a failure within the company’s own infrastructure. A transition to a back-up switch did not function as tested, causing a large backlog of data.

USER FEEDBACK: Angry smartphone users took to Twitter to vent frustration with the company and bemoaned the loss of their messaging capabilities, questioning why the company took so long to restore services.