The software has been built from the remnants of MeeGo, a project abandoned by Nokia in 2011 in favour of adopting Windows Phone for its handsets.
The Jolla phone - pronounced Yol-la - is due to be released by the end of the year, and will only be sold online. It will enter a market already heavily crowded with several operating systems.
"For a couple of years we haven't had anything really interesting in the mobile phone market," said Antti Saarnio, chairman and co-founder of Jolla. This creates opportunities for newcomers to come in. It's different, but it's purposefully different."
The phone has a 4.5in screen, with an eight megapixel camera. It also supports 4G and is compatible with apps made for Google's Android.
Among the handset's other features is what the company has called "The Other Half." The coloured back of the phone is interchangeable - and the operating system's interface will change depending on what type of cover you have.
Source: BBC News
