Board Thread:Questions and Answers/@comment-91.110.90.65-20191112184435/@comment-43604755-20191113144753

As far as I know, you cannot reset your character. But if you want to reset your progress, Go to your mobile settings and disconnect your google account with SF3. When you open the game again and connect to google play games, a message will come asking you whether you want to continue with your previous progress or you want to start a new one. Then, you can kick off with your refurbished progress.

This worked great two years back. I don't know if auto-login has come into play. In that case, someone else might be able to help you.