All Lumia phones feature a live tiles layout on their homescreen, offering news and social media updates as they happen.
Windows Phone handsets feature bright colour schemes in contrast to the more muted colours of Android phones and the iPhone and come with a selection of exclusive apps pre-installed.
These include the Cortana voice commands app, the highly rated Here mapping software, OneDrive cloud storage and the mobile versions of Microsoft's Office suite of programs.
Microsoft entered the mobile phone market in the early 2000s and by 2007 its Windows Mobile platform was the most popular smartphone operating system in the US.
In 2010 Windows Mobile was rebranded Windows Phone to mark a huge overhaul of the platform. This saw the earlier software’s traditional menu-based layout replaced by more user-friendly live tiles.
Microsoft inherited the Lumia brand when it bought Nokia in 2014, having previously been in close partnership with the Finnish company.