Nokia's first smartphone to run the Windows Phone 7 mobile platform, the Nokia Lumia 800, will cost £399 on a pay-as-you-go basis.

According to Nokia's dedicated pre-order webpage, while Orange, Vodafone and 3 will all be stocking the handset, the only network to offer a price for the smartphone is 3 at £399.

Furthermore, the handset is available on monthly contracts starting from £26 per month, although a £199 charge towards the smartphone is incurred on these contracts. The Nokia Lumia 800 is available for free on contracts priced from £30 per month.

The Nokia Lumia 800, which was first unveiled last week, will be made available in the UK on November 16.

The Nokia Lumia 800 features a 3.7in AMOLED curved display and is powered by a 1.4GHz processor based on Qualcomm's Snapdragon S2. Available in cyan, magenta or black, features a 8Mp camera with Carl Zeiss lens, the ability to capture HD video at 720p, 16GB of internal memory and access to 25GB of online storage space through Microsoft's SkyDrive for free. The handset measures 117x61x12mm and weighs 142g.

At the same event, Nokia also unveiled the Nokia Lumia 710, which is also powered by the same 1.4GHz processor based on Qualcomm's Snapdragon S2 and comes with interchangeable coloured back covers.

Microsoft first took the wraps off its Windows Phone 7 mobile operating system over a year ago and at the time said the mobile platform would offer a shift of focus from functionality to the user. Initially there were only six handsets available with the Windows Phone 7 operating system and these were made by Samsung, HTC, LG and Dell..