Its primary focus is unification with Windows 10, its PC counterpart, in software and services; in accordance with this strategy, the Windows Phone name has been phased out in favor of branding the platform as an edition of Windows 10, Windows 10 Mobile emphasizes software using the Universal Windows Platform, which allows apps to be designed for use across multiple Windows 10-based product families with nearly identical code and functionality, and adaptations for available input methods.
Windows 10 Mobile also features Skype messaging integration, updated Office Mobile apps, notification syncing with other Windows 10 devices, Microsoft Edge web browser, and other user interface improvements.
Entering the Android environment late, we knew we would have a hard time differentiating." While Nokia would have had more long-term creative control with Android (note that Mee Go as used by Nokia resembles Android more than it does Windows Phone 7 as both Android and Mee Go are based on the Linux kernel), Elop enjoyed familiarity with his past company where he had been a top executive.
Jo Harlow, whom Elop tapped to run Nokia's smartphone business, rearranged her team to match the structure led by Microsoft's VP of Windows Phone, Terry Myerson.
Starting with this release, Microsoft has also dropped the requirement that all Windows Phone OEMs include a camera button and physical buttons for back, Start, and Search.
Windows Phone 8.1 also adds Cortana, a voice assistant similar to Siri and Google Now.
As a result, Nokia's hardware division is now a subsidiary of Microsoft operating under the name Microsoft Mobile.
In February 2014, Nokia released the Nokia X series of smartphones, (later discontinued) using a version of Android forked from the Android Open Source Project.Windows Phone 8.1 introduces transparent tiles and a customizable background image for the Start screen.The image is visible through the transparent area of the tiles and features a parallax effect when scrolling which gives an illusion of depth.Windows 10 Mobile was announced, on October 8 2017, that it no longer receive system features updates, but it will continue to receive security updates.With the company gradually changing its focus from Windows Phone to VR and Surface lineup, Microsoft is no longer developing new features or new hardware for mobile operating system.The home screen, called the "Start screen", is made up of "Live Tiles", which have been the inspiration for the Windows 8 live tiles.