Please add your suggestions to improve the documentation for the Fairphone - FP2 - FP2 here …
I guess the following section is general and not device specific:
Tip: Installing a custom recovery or unlocking the bootloader will erase all data on your device! Take a backup of your data before proceeding!!
This is not true for the FP2. Flashing TWRP doesn’t erase data. And the FP2 comes unlocked by default and the bootloader cannot be locked (by accident which then would require a later unlock).
Thanks Ingo will make the correction in the documentation specific to the FP2