Here’s a Fairphone page on manual install, which is clearer and as official is more confidence boosting
https://support.fairphone.com/hc/en-us/articles/360048050332-Manually-install-Fairphone-OS-on-FP3-FP3-
Just a bit more on installing the android dev bridge.
Here is a page written by the e foundation for those that want to switch from the default android 10 ~ this is just to show the adb install process.
https://doc.e.foundation/pages/install-adb
I have installed adb on my Raspberry Pi computer, the process as you can see is much the same ~} you have to install the adb for the OS of your computer e.g.
Hi I’m just getting my head around using ADB on a Raspberry pi (Buster OS)
It has been many years since I used ADB on a Windows to Samsung.
The phone does not need to be rooted or OEM unlocked
It does require enabling Developer options > USB debugging
I downloaded the adb files to the Rasp-pi via terminal commands
sudo apt install android-tools-adb android-tools-adbd android-tools-fastboot android-tools-fsutils android-tools-mkbootimg
Then
Connect cable Rasp- pi USBA to FP3 USBC.
Usi…