App Download ((top)) Free: Windows 10 Mobile Upgrade Advisor

For enthusiasts, there are community-preserved archives and manual tools: DHT Upgrade Advisor

The Upgrade Advisor was notorious for locking out perfectly capable phones (like the Lumia 1020 or HTC One M8) due to carrier politics. Today, the community uses a tool called WPInternals to unlock the bootloader, tweak the registry to identify the phone as a "Lumia 950," and then pull the update via OTC. windows 10 mobile upgrade advisor app download free