BlackBerry users in North America faced delays in receiving e-mail on their devices Thursday.
The company that makes the popular messaging phones, Research In Motion Ltd., later said technicians isolated and resolved the issue. The company said it is investigating the cause.
RIM said users were still able to make phone calls, browse the Internet and send and receive text messages. RIM didn't say how many users were affected or how long the outage lasted.
RIM's system is relatively reliable, but its centralized structure means that any problems can affect millions of users.
The outage came the same day RIM, which is based in Waterloo, Ontario, released quarterly earnings.
The company said its net income for the third quarter rose by 59 percent, as the company attracted new subscribers and sold 10 million phones, a record.
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