How to install W10 Mobile (build 10240) on Lumia 930, 640, and 640XL

This post contains a very simple guide on how to install Windows 10 Mobile on Lumia 930, 640 and 640L. Download links to the flashable roms are also available here.


  • *Windows Phone Image Designer (needed for flashing ROM) – Download

Disclaimer: Your use of this guide is strictly at your own risk. If any goes with your device, you are entire responsible for it, I or Leakite will not be held responsible.

Please make a backup of your current rom before you proceed.

Flashing guide
Step One: Download your device ROM from links provided above.

Step Two: Download Windows Phone Image Designer (link above).
Step Three: Power off your device and boot into UEFI mode by holding down Volume up button (a lightening bolt icon should display on your screen)
Step Four: Connect your device to PC and open Windows Phone Image Designer folder. Select the x86 folder or the x64 folder (depending on your windows version).
Step Five: Run the Start.bat file and Windows Phone Image Designer will launch.Step Six: Now select Flash a Windows Phone image onto your phone and click Next.

Step Seven: Your device should show up under flashable devices. Click on Change, then select the downloaded ROM

Step Eight: Hit Flash and wait for the flashing process to complete

Step Nine: Once flashing process is complete, your phone will reboot and build 10240 must have successfully installed on your device.



5 Responses to “How to install W10 Mobile (build 10240) on Lumia 930, 640, and 640XL”
  1. Unknown February 20, 2016
  2. Collins Edim February 20, 2016
  3. Collins Edim May 6, 2016
  4. HARI May 10, 2017
    • Leakite May 10, 2017

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