Refurbed Fairphone 4 purchase. Returning to default OS

[yvmuell]

Just to reiterate: so far bricking was only an issue for the FP5 when Arch Linux with platform tools 34.0.4. was used when it got stuck at the point mentioned. While I guess its not device specific its def specific to the platform tools version, so verisons 33. should not cause this brick.

Refurbed Fairphone 4 purchase. Returning to default OS

If you want to lock the bootloader, I would advise you to flash the OS again (technically you only need the frp partition) so that “fastboot flashing get_unlock_ability” returns 1. Then, do “fastboot flashing lock_critical”, keep Volume Down pressed while confirming to reboot into the bootloader and finally do “fastboot flashing lock”. That way, you should be safe from bricks.

For the FP4: Always! Check get_unlock_ability before locking. Dont just assume its set back to 1. You said it at the beginning, and for the FP4 thats reallly important!