I installed recent update which required a new password. I put the same password I always do in (someone was also watching as I did this). I was able to get in and out until I restarted it the next day. It would only let me sign in with the password (obviously not the one I use). I have google linked but it doesn't give me the option to sign in with it. I tried the lock feature, but since there is another lock already on it it won't take.
I have called Samsung and they told me to change my password and to not have it on for 24 hours. I had to have AT&T conference call in to verify my account. I did this and nothing happened. Samsung then said 72 hours. I can ring my phone from my google account and put an optional phone number in so I can call out to one number.
I can't reset my phone as I have a year of pictures of my kids on it. This isn't an option.