If you’re Galaxy S6 has
become frozen and will not respond to anything, try a soft reset. A soft reset
will restart the device and will not erase any data.
First
method:
First,
turn off the phone by using the Power button.Hard Reset SAMSUNG G920F Galaxy S6
Then select from Recovery Mode menu "wipe data / factory reset" using Volume buttons to navigate and Power button to confirm.
Remove screen password.