Samsung Galaxy S7 does not accept fingerprint and PIN
I have a big problem. It's the second time since I bought my phone recently. I just added 3 fingerprints to my phone and set up a PIN. Just after that I didn't use my phone for couple minutes maybe and now I can not unlock it again. I also tried to restart it. It trys to open the phone and show's that it's connected to the Wifi. But it always gets back to the lock screen or shows me to enter the PIN again. I know the PIN for sure but it won't accept it. The phone is sprint unlocked and has some annoying messages sometimes, like: "unfortunately ui has stopped"
Can someone help me please cause I don't want to reset it because then some important data is gonna be wiped off.