#NokiaWorld: Nokia unveils Lumia 800 and Lumia 710 Windows Phone devices

Nokia has unveiled its first smartphones running Windows Phone 7 since announcing in February that it will partner with Microsoft to use the operating system.

The Lumia 800 and 710 were unveiled by chief executive Stephen Elop at the annual Nokia World event in London, and form the first stage of Nokia's attempt to re-establish itself in the high-end mobile market.

The 800 is the premium phone of the two, set to retail at around €470 before taxes and other costs, and will be available from November in the UK, Italy, France, Germany and Spain.

The device has a 3.7in screen and 1.4GHz processor, and comes in cyan, magenta and black. It has 16GB of internal storage as well as 25MB of free storage on Microsoft's SkyDrive platform.

The second device, the 710, will retail at around €270 before taxes and other costs, and features a 5-megapixel camera as well as the same 1.4GHz processor.

The 710 is designed with a back cover that can be replaced with alternatives in the same colours of the tiles on the Windows Phone operating system.

Both devices will run on the Mango version of Windows Phone 7 that has been rolled out to other phones in recent weeks, and Elop touted the new models as the "first real Windows Phone devices".

Both phones feature a range of Nokia applications unique to the devices, most notably Nokia Drive which offers built-in turn-by-turn navigation.

Nokia also unveiled four low-end handsets for emerging markets in a range called Asha, which Elop said will help connect "the next billion" mobile users to the internet over data connections.

The phones offer features such as dual-Sim capabilities and touch screens, and start at €60.

The Lumia devices are the first step in the rehabilitation of Nokia in the smartphone market, and IDC analyst Francisco Jeronimo said the handsets proved that the firm still has what it takes to compete.

"It will take a lot more than just a couple of phones to bring Nokia back, but what we are seeing today is an excellent first step," he said.

"Nokia has shown it can change its culture, re-adapt and refocus on growth by delivering devices that combine the best hardware with unique services at the right price and at the right time. We foresee a brighter future to Nokia now compared to a year ago."