U.K. mobile phone operator Huchison 3G UK on Monday rolled out the Skypephone, a handset designed to simplify use of the Skype VOIP (voice over Internet Protocol) application.

Huchison 3G, branded as “3″ in the U.K., is offering free calls between Skype users through the 3G mobile phone, which goes on sale Friday in the U.K. The Skypephone will be released by the end of the year in Australia, Denmark, Hong Kong, Italy, Ireland, Macau and Sweden.

Some mobile phones already support Skype, but volume-based data usage charges typically make the service expensive to use. Skype recommends using its mobile application with unlimited Huchison 3 data plans or Wi-Fi.

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