I’ve had my FP2 for about 9 months. Today it ran out of battery remarkably fast - like by lunchtime when I had hardly used it. When I recharged it later, it continuously froze and would randomly turn off and on. I took the battery out for several hours to let it cool down, but now I’ve plugged it into a charger and it keeps vibrating and showing the Fairphone black and white screen, before going black and then repeating the cycle 30seconds later. I’ve tried two different chargers.
It seems (as I don’t recall the user who posted the video ever telling us how it ended) that they were/are replacing phones that show this issue - though I’ve also heard of cases where modules were replaced. To arrange warranty replacements/repair you’ll need to contact Fairphone support.