If you see the below message when installing CalyxOS on your FP4:
Not locking bootloader of FP4 fastboot flashing get_unlock_ability returned 0 Please visit https://calyxos.org/FP4 for more information.
That’s due to a bug with the Fairphone 4 bootloader, which may lead to a non-functioning device.
Thus, as a precaution, we’re not locking the bootloader.
Contact us at Community for more help.