I am using an FP4 with Android since a few weeks.
After each update/restart, the phone asks for a SIM card PIN which I enter without issues.
Then, I need to enter my device PIN.
My FP4 does not accept the correct PIN (I am 100% sure about the PIN). The first time it was accepted after 15 attempts; now I have tried over 60 times.
I tried restarting several times, “find my phone” on Google (“device cannot be reached”) and all configurations of WiFi/5G/flight mode. None of this is helping and it is just a question of time how long I can use my phone.
Does anyone have an idea what is wrong and what I can do, apart from going for another phone?
To me that sounds like there is a chance you accidentally hit at least one wrong digit while setting up your PIN and by chance you made the same hit in one of your many tries. Have you considered this? It is extremely unlikely - if not practically impossible - that the phone would take the exact same PIN at the 15th try if nothing changed. You could experiment by trying the adjacent number combinations, hoping that you get it right at some point. This would save you the reset at least.
To be perfectly honest, I remembered a pattern on the number board instead of a PIN. Apparently my input was wrong, also caused by the fact that I never used the PIN before forced by the restart. So it was not a FP4 problem, but my mistake.