Starting with Windows 10 Mobile, Microsoft will make updates available for the Operating System on your phone, including security updates, for a minimum of 24 months after the lifecycle start date. These updates will be incremental, with each update built on the update that preceded it. Customers need to install each update released in order to remain supported. Distribution of the updates may be controlled by the mobile operator or the phone manufacturer from which you purchased your phone. Update availability will also vary by country, region, and hardware capabilities.
Third party products that integrate Microsoft products, such as the Windows Phone Operating System, are not included in the Microsoft Support Lifecycle Policy. Please contact your mobile operator or OEM for more information about support and warranty on your mobile hardware.