I have once used my samsung tab s3 before and since then never again. Now I want to start using it again but I can't get in. The tablet is back in starters modus. When I try to get in, I first have to fill in my languege. After that I can fill in a Google account that is used before on this tablet. I have tried all my Google accounts but none are working. I also tried a hard reset but that's also not working. Maybe someone has a suggestion for me?