Microsoft officially pushed the latest Windows 10 Mobile Build 15254.587 system update. Which is also the September 2019 cumulative update patch for Windows 10 Mobile creator update, namely Windows 10 Mobile 1709 version users. By convention, no new features adds, bringing some fixes.
This update is primarily a security update that includes the Windows kernel, Windows Media, Windows storage and file systems. And Windows application platforms and frameworks.
Users can download Windows 10 Mobile Build 15254.587 by checking for updates in Settings > Updates & Security > Phone Updates. According to the support documentation, Windows 10 Mobile will stop receiving cumulative updates in 2020. The final update will release on December 10, 2019.
Microsoft said Windows Phone users will need to create backups for set-up and supported applications by March 10, 2020. Some services will stop working by 2020, but after Microsoft ends the support. You can upload and restore photos from your backups in a few months or a year.
Microsoft recommends that Windows Phone users turn to Android and iOS devices when support is over.