This image helped me realize that there are several bootloader modes: https:// tektab .com /2015/10/31/android-bootloaderfastboot-mode-and-recovery-mode-explained/
You are linking to line 29 “recovery_boot” … for booting into recovery “<kbd>Volume Up</kbd> + <kbd>Power</kbd>” is totally correct. It just isn’t needed to install /e/ on the Fairphone 3, the TWRP reference currently found in the install guide is an error, to be removed.
Notice how line 14 “download_boot” says " <kbd>Volume Down</kbd> + <kbd>Power</kbd>" … which is correct for booting into Fastboot Mode aka bootloader.
Press Volume + or Volume - to display boot options, select fastboot and confirm with Power to reboot on fastboot
When the warning is displayed, I can pause the boot, and then resume it. Then it tries to boot and fails. I can then start it again, or factory reset. If I try “Volume +” or “Volume -” in the warning state the device powers off. In the other menu, fastboot is not an option.
The only way I found to access fastboot is “Volume -” + “Power” from the powered down state.
[EDIT] It is indeed the case. The string assosciated with download_boot is nowhere to be found in the FP3 manual.
A search for "With the device powered off, hold <kbd>Volume Down</kbd> + <kbd>Power</kbd>. Release when boot logo appears." only finds https://doc.e.foundation/devices/FP3 which is not a page that you look up during installation.
Did you have updated to Android 10 before you tried to install /e/?
I think the boot sequence/behaviour with unlocked bootloader differs a bit, i.e. my guess is the description only matches 100% when coming from Android 9 stock rom.
Yes indeed
That must be the reason why it was different.
FP3 android 10 updates are being rolled out. It may be worth updating the wiki for those new potential users.