Apple's 3G iPhone has been notoriously hard to get hold of ahead of today's official release, but you'd have thought Steve Jobs would have given one to his old friend Steve Wozniak.

The man credited with inventing the first Apple computer told an audience at the Social Networking Conference in San Francisco yesterday that he planned to queue all night to get his hands on the second-generation iPhone for new features such as its faster web access and built-in GPS support.

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However, Wozniak said the iPhone 3G was far from a must-have gadget. "These aren't break-the-bank items. A lot of the people I know just aren't going to upgrade yet. I always like to have the latest and the greatest."

The same goes for plenty of other iPhone fans around the world. The handset went on sale in the UK at 8am this morning, and queues have been forming outside the Apple store in London, as well as O2 and Carphone Warehouse outlets.

For more mobile phone news, reviews and our iPhone 3G spotlight, see Mobile Advisor