To unlink your Google account from your Samsung device, follow these steps:Go to Settings on your Samsung device.Select Accounts.Click the Google account you would like to remove.Select Remove Account.
The only way to remove your Google account from your phone after a factory reset is to log back in and delete the account.
To remove an email account from your Galaxy S8, go to Settings -> Accounts -> Email -> Tap on the email account you want to remove -> Account options -> Unlink account.
To delete a Google Gmail account, go to the Settings page in your Gmail account. Click on “Delete your account or services” and follow the instructions.
To unlink a Google Account, go to the Settings page and click on “Delete your account or services.” From there, click on “Delete Google Account and data” and enter your password.
