on your phone, or is the activation page itself giving you an error message?
If you've forgotten which email address you used to sign up, go to the Samsung account sign-in page and look for the "Forgot your ID?" or similar link. You'll likely need to verify your identity using information like your name and date of birth to retrieve your account ID. signinsamsungcomkey
Connecting a profile via the remote authentication method is straightforward: on your phone, or is the activation page