Sticking at 16-20% is typical during the Ramdisk loading phase just before the actual flashing of system files begins.
If all else fails, your current PC’s USB controller or system architecture may be incompatible (especially on Ryzen 3000/5000 series motherboards with specific BIOS versions).
Error 3194: Unable to load restore ramdisk (failed to verify signature).
Elias dropped the phone onto the mat. It clattered, the sound loud in the quiet room.