Kathleen Hall is correspondent for Computer Weekly. She writes about technology issues in small to medium-sized enterprises, as well as specialising in the retail and services sectors.
Previously Kathleen worked as business reporter for Vitesse Media, covering SMEs and enterprise IT.
Follow her on Twitter @KatHallCW
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Demand for Apple's iOS 5, which enables the company's "iCloud" service, has caused customers downloading the update to see their apps and data being wiped.
The update was intended to give iPad and iPhone users some of the features available on the iPhone 4S, which went on general release today.
Apple's servers became swamped by the demand for the upgrade, with reports that the servers were failing half the upgrade requests.
Users also reported sever delays in downloading iOS 5, with some saying it had temporarily rendered their devices inoperable.
One user Tweeted: "Don't do the iOS 5 update... your iPhone will crash or get bricked. Entire office is going nuts here!"
The surge in internet traffic in the UK jumped by 200 gigabits per second as users clambered to download the free upgrade, according to the Guardian. This was equivalent to more than a fifth of normal traffic - a spike that lasted for roughly four hours, it said.
Apple's iOS 5 upgrade also integrates Twitter. iMessage allows SMS, photos and videos to be sent more easily between iOS 5 users. The OS also features an updated software development kit (SDK) with over 1,500 new APIs and developer tools.
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