Project Astoria for Lumia 640XL/640/930

Install stock ffu from windows device recovery tool link 

link to Windows Phone image designer

Put the phone in flash mode by holding power off then volume down. Open Windows Phone image designer and the flash stock ffu 

Link

Put phone in aeroplane mode. This will stop it from updating while you prepare to disable system updates

Install interop tools

With registry browser go to HKLM ->SYSTEM -> CurrentControlSet -> Services

The default value is 3 changing it to 4 will stop updates but the store would not work so we need to change it back to 3 and reboot

Use the deployer app to install an apk file

Astoria files