This release is notable and different from previous releases because Windows 10 build 10240 is from the RTM (Release to Manufacturing) branch. Run the Start.bat file and Windows Phone Image Designer will launch. As Windows 10 is finalized, Microsoft has released a new build for Windows Insiders. Select the x86 folder or the 圆4 folder (depending on your windows version). Power off your device and boot into UEFI mode by holding down Volume up button (a lightening bolt icon should display on your screen)Ĭonnect your device to PC and open Windows Phone Image Designer folder. How to install Windows 10 port ROM for Lumia 920 Flashing guide for Windows 10 Mobile on Lumiaĭownload your device ROM (Windows 10 Mobile) from links provided above.ĭownload Windows Phone Image Designer (link above). Please make a backup of your current ROM before you proceed with flashing Windows 10 Mobile. The post from Windows Insider chief Gabe Aul doesn't call out this build as RTM or an RTM candidate.

If any goes with your device, you are entire responsible for it, I or Leakite will not be held responsible. Update: Microsoft just released Build 10240 to its Fast and Slow Ring Insiders on July 15. *Windows Phone Image Designer ( needed for flashing ROM) – Download | Downloadĭisclaimer: Your use of this guide is strictly at your own risk. Download links to the flashable ROMs and required flashtool are also included. This post contains a very simple guide on how to install Windows 10 Mobile (build 10240) on Lumia 930, 640 and 640L.

Windows 10 build 10240 update