Install proces om Fairphone 3 not picking up after phone is in fast boot mode

[eosfan]

Thank you very much. I found this explanation

[HOWTO] Unlock bootloader

Why must the bootloader be “unlocked”? Before flashing a custom ROM like /e/ you must unlock the bootloader otherwise the bootloader prohibits the custom ROM to boot. Most vendors only allow their own stock approved software to boot. Warning: Unlocking the bootloader will erase all data on your device! Before proceeding, ensure the data you would like to retain is backed up to your PC and/or a online drive. Prerequisites: Working ADB and Fastboot Developer options enabled Enable OEM unloc…

Which brings me to this page
https://doc.e.foundation/devices/FP3/install
But then I still do not understand how to use these commands:

• Once on fastboot mode, unlock the device by running fastboot flashing unlock

On previous versions of fastboot, the command is fastboot oem unlock

• The device will ask you to confirm the unlocking. Confirm by selecting UNLOCK THE BOOTLOADER and confirm with Power
• The device reboot automatically. It will show a warning. Press Volume + or Volume - to display boot options, select fastboot and confirm with Power to reboot on fastboot