The WP phone user currently running Windows 10 Mobile Version 1709 has upgraded to Build 15254.552 after receiving the update. If you are using a Windows 10 Mobile Creators Update (Version 1703) phone, the upgraded version number is Build 15063.1631.
Windows 10 Mobile Build 15254.552 and Windows 10 Mobile Build 15063.1631 include security updates for Windows applications, Edge browsers, Windows graphics, and the Windows kernel. Other improvements are listed in the update log, but not for Windows phones.
On January 9 this year, Microsoft announced on its official website that December 10, 2019, Windows 10 Mobile (also known as "Windows 10 Mobile") users will no longer be eligible to receive new security updates from Microsoft for free. , non-security patches, free assistance support options, or online technical content updates.
According to Microsoft, only device models that qualify for Windows 10 Mobile 1709 support will be supported until the end date. For the Lumia 640 and 640 XL, Windows 10 Mobile 1703 is the last supported operating system version, and its support will end on June 11, 2019.