Hello so today I encounted my dad's phones pin code not working. The pin-code was 100% right. After typing the code, the phone just goes back to the lock screen. I can't even close the phone.
Please give the phone a soft reset.
Press and hold the (volume down + power) buttons until the phone restarts.
No data will be lost.
Same! My Galaxy A51 just stopped recognising my pin today and I'm locked out. I know my pin is 100% right but Samsung says it's not. Now I can't access my phone at all or even turn it off. May be a bug? Wish i knew how to fix without factory reset that will loose all my stuff.