My Fairphone 3 shuts down without warning. Usually mid-call, on low but not critically low battery. The phone is less than 6 months old.
I seem to have the same problem.
Has the phone become very hot when the shutdown occurs?
No the phone feels fine and there’s nothing else to indicate a problem
Did you check this thread?
Most of time this happens when the device battery doesn’t fit properly… Have checked you battery position?
I just had a random shutdown: full screen game open, charging, took a screenshot with PWR+VOLDWN, screenshot animation got slow, phone crashed and went straight to fastboot.
Add this to frequent randomly dropped calls and disabled common functions, A.0134 is really beginning to fit right into 2020
That sounds to me like your phone ran out of RAM…