Windows Phone 8.1 stopped receiving security updates and store submissions wound down. TeamsMicrosoft Teams — chat, video calls, and Office integration for workplace collaboration. that built C#/XAML apps for Lumia devices migrated to iOSApple's mobile operating system — runs iPhone and iPad with a sandboxed app ecosystem. and AndroidGoogle's open mobile operating system — the dominant platform for smartphones worldwide. or abandoned mobile clients. Windows 10 Mobile continued receiving updates until January 14, 2020, when MicrosoftThe software giant behind Windows, Office, Azure, and Xbox — founded by Bill Gates and Paul Allen. ended support for its last phone OSOperating system — software that manages hardware and provides services to applications. entirely.

Windows Phone's end shut down a native mobile platform outside the iOSApple's mobile operating system — runs iPhone and iPad with a sandboxed app ecosystem.–AndroidGoogle's open mobile operating system — the dominant platform for smartphones worldwide. duopoly.

It consolidated mobile development into two ecosystems for most of the 2010s.