"A lot of the times if I meet someone, and I see they have a BlackBerry, I don't even want their number or care. I just want their BBM," or their BlackBerry instant-messaging ID, said the 23-year-old tanning-salon manager and student. "I didn't even have my boss' number. I only contact him through BB."
He added: "I go to sleep with it in my hands. It's the first thing I do when I wake up in the middle of the night. It's the first thing I do when I wake up in the morning."
The second BlackBerry outage in less than a week disrupted service for millions of users on two continents Tuesday and Wednesday, demonstrating how vital -- and how addictive -- the device dubbed the "CrackBerry" can be.
The company behind the service, Canada's Research in Motion Ltd., blamed a software upgrade for the problem, which it said was confined to North and South America.
RIM said BlackBerry users were unable to send or receive e-mails and instant messages, but did not lose phone service. Many users also found the Internet inaccessible. RIM said the disruptions began about 1:45 p.m. on Tuesday, worsened about 6:30 p.m. and began to be fixed about 11:30 p.m. Service appeared restored by Wednesday afternoon. RIM would not disclose exactly how many subscribers were affected.
The glitch comes after another outage last Thursday and at least three breakdowns in 2008.
"One of RIM's big advantages is that it's perceived as a reliable device," said Duncan Stewart, director of research and analysis at DSam Consulting. "To lose the advantage of reliability would, in fact, be a very big deal for this company."
RIM has sold more than 75 million BlackBerrys since its debut 10 years ago. It now counts 36 million subscribers around the globe and ranks second in the worldwide market for advanced "smart phones," with a 21 percent share, behind Nokia Corp.'s 39 percent, according to market research firm Gartner Inc.
CanDace Johnson, 25, a nanny living in New York, said her BlackBerry lost all Internet service about 6 p.m. on Tuesday, leaving her cut off from the e-mail account she uses to keep in touch with her boss.
"If someone is watching your child, you want them to respond to your messages," she said.
Robert Hagler, a 46-year-old lawyer in Daphne, Ala., noticed about dinnertime Tuesday that the normal flow of e-mail and Facebook updates on his BlackBerry Curve had petered out.
"So I went home that evening, logged on to my laptop, and there's 20 e-mails sitting there," he said. "All my iPhone friends are just tickled to death."
When Mr. Marshall suddenly stopped getting reply messages from his friends, he lost his cool: "I kept unplugging my phone, turning it off and on. I was getting very upset when it wouldn't work."
"My whole life is based on my BBM," he said.
Although BlackBerry service is sold by wireless carriers, RIM manages its messaging network itself. The centralized structure means that any problems can affect millions of users.
This week's outage apparently stemmed from a flaw in recently released versions of RIM's instant-messaging software, known as BlackBerry Messenger. RIM released a new version Wednesday that solves the problem.
RIM, which is based in Waterloo, Ontario, apologized for any inconvenience. The company declined interview requests.
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