In a bold pillarbox shade that's exclusive to O2 - and a diverting change from the shades of grey otherwise dominating the mobile market - the Lumia 520 case is actually detachable, unlike the unibodies of its premium brothers, meaning you can equip yourself with a range of coloured shells to match your mood. The 4" screen is highly touch sensitive screen, responding even to the touch of nails and gloves.
The 5 megapixel camera comes with some cutting edge editing software, such as the incredibly handy Smart Shoot function. Tired of having to take several photos to get one decent one where no one is pulling a daft face? Smart Shoot performs a quick burst of 5 photos in 4 seconds, so that you can edit and combine the best takes afterwards. Change history! Other neat camera features include Cinemagraph, which allows you to add motion to your still pictures, and of course the wide angle lens, which lets in extra light and renders your photos sharp and bright.
On top of all that, you can expect your Lumia 520 to be rocking a full Microsoft Office out of the box, as well as Nokia Music, HERE Maps (the rebranded Nokia Maps), 8GB of internal storage and a MircoSD slot so you can expand it up to 64GB - and that's before counting the 7GB of free cloud storage on Microsoft SkyDrive. Space really won't be an issue!
As an operating system, Windows 8 is bright, fun and engaging - not to mention colourful, and since it's been optimised for dual-core processors, you'll find it runs extremely smoothly on the 1GHz of dual-core power this phone has to offer.
All in all, the Nokia Lumia 520 on O2 offers a rich user experience: all the best Lumia functionality, the very latest Windows interface - and a super jammy price-tag. What a winner!