Click the "Start" button (play icon). Once the progress bar turns green and shows "Passed," disconnect the device. Important Note: Flashing will erase all user data
Remove battery (if removable) and reinsert after 5 seconds. v75 flash file spd
Open the SPD Upgrade/ResearchDownload tool and load the .pac file (the flash file). Connect Device: Power off the phone. Click the "Start" button (play icon)