To recover or unbrick a Microsoft Lumia 650, you need "Emergency Files" (typically .ede and .edp files) and an FFU firmware image. These files allow the Windows Device Recovery Tool (WDRT) or manual command-line tools like thor2 to communicate with the phone's processor when it is in a "dead" or "QHSUSB_BULK" state. 1. Required Files & Tools Before starting, gather the following components: