Google has said it is defending its online advertising empire with the launch of its own brand mobile phone.
It is the first time Google has designed and sold its own consumer hardware device.
Google said the Nexus One represented the next frontier in the company’s $20bn (£12.4bn) core business - selling advertising through search.
“It’s all about the mobile web, and advertising is their bread and butter,” said analyst Michael Gartenberg.
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