Comment by cloud-oak
4 hours ago
Sadly had a very similar experience about the screen of my FP4, which seems to have a serial fault of producing random inputs whenever it so pleases [1]. Knowing I had bought a phone with great self-service claims, I was confident they could just send me a replacement screen and I could swap it myself. But no, they insisted that I had to send it in, claiming that this would be better for the environment.
I do want to support Fairphone's mission and wish I could whole-heartedly recommend it to friends and family. But this experience and the many software issues have led me to recommend other options instead.
You can definitely buy the replacement screen for the FP4 as it's on their online shop. If you were going for repair under warranty it does seem odd not to just send you the part if you're happy installing it.