Samsung PN51E6500EFXZA - Manual (Page 328)

service provider accounts, and delete or
deactivate your Samsung account.
Link to other accounts : If you have
existing accounts with any of the
providers listed by the Link to other
accounts function, you can associate
the provider account and the provider
account password with your Samsung
account. If you associate the account,
you will be able to log onto the
account through Smart Hub easily,