I have the same problem! Press volume+ and power simultaneoulsy doesnt work :(
To force a shutdown/reboot press Vol Down + Power. To enter maintenance mode press Vol Up + Power ( + Bixby if one exists ) AT START. When the phone is up and running Power + Vol Up won't work.
Thank you for the help. Unfortunately this does not work. I am asked to enter a password, but I have never set a password. I also cannot create a new security code or password, or a fingerprint or face recognition.
do you lose your data then?
Yes, everything and completely. Which is internally on the phone, of course. And not on the SD. Which you should remove before anyway.
I am also facing same issue on my s8+, showing incorrect pin, from last 2 years i am using same pin..
I re-entered the pin more than 14 times and the phone is reseted to factory default..without any data..
Please press Power + Volumn Down (-) button, it will hard restart your mobile. I did it and it solved my problem.
Please do the same buddy. Definitely it will help you.