I've been trying to follow multiple potential guides.
The latest one I've tried is this one.
Everything works fine, downloading the Android Platform Tools (adb, fastboot, etc), downloading + updating the USB drivers, etc.
However, the problem starts at trying to boot the phone into fastboot.
Trying to turn the phone off and pressing "Power" + "Volume Up" produces no result.
When connected via USB, you can see the red light flash for a moment, every ~5 sec, but nothing happens. Trying to run adb reboot bootloader does reboot the phone, but then it gets stuck at a screen with a single
FASTBOOT mode... writing on the bottom, and the Windows keeps making a "device connected" / "device disconnected" sound in a 5 second cycle.
Trying to run any fastboot command at this point just produces
< waiting for any devices >.
it should be noted that:
adb devicesdoes recognize the device (already authorized).
- I can reach "Factory Mode" (the one with version information and lots of tests) via "Power" + "Volume Up" from a shut-down phone.