All the important info you find here https://www.fairphone.com
Therefore, I concentrate on my personal feelings and impressions which are , of course, subjective. The phone is not rooted!
FP3 looks nice and of good quality. The bumper protects well and even with bumper it does not look thick.
In the beginning i had slight doubts that on/off-switch and volume which are situated left hand side are comfortable enough, but I found it in connection with the longer phone very comfortable for left- and right- handers. Left-handers can easily use the buttons with left thumb and right- handers even can use 2 fingers and there is no feeling that FP3 could slip away.
Fingerprint-scanner on the back does not disturb the smooth picture, if you do not use it like me.
Display is light and phone works like a charm. As expected there are only the basic Go**le apps preinstalled. There is no bloatware. I like Fairphone!!!
New battery is amazing and works nearly one week if you save energy as far as possible. Furthermore I use Blokada from F-Droid and have the impression that besides blocking ads and making browser faster it saves energy.
Did not test any games and use mainly software from F-droid.
APN works out of the box even with Drillisch. On FP2 I had to fill-in APN-settings manually.
Loudspeaker is also very good and listening to my favorite audio-books works without vibrations and is a pleasure.
Camera works very well with the installed standard app but with open-camera -app pictures are darker. Do not know why, but it can be only the software.
The only missing item is an OS without G***le like Lineage but I am sure it will come in future.
I am very happy and recommended this phone to my friends!
P.S. FP2 is still alive and remains within family.