Yahoo account holders can access any of Yahoo's services by simply logging into the platform using their username and password, but the rules for non-Yahoo account holders are a bit more specific. With so many changes taking place on Yahoo's platform, many users of Yahoo services (such as Flickr or Fantasy Football) are finding it difficult to understand if and how their various online IDs apply to different services. This article will explain how to sign in to Yahoo services using a Facebook or Gmail account.
N.B. Yahoo no longer allows users to sign in to Yahoo using Facebook or Google. All Flickr or Fantasy Sports account holders must transition to a Yahoo account in order to continue accessing those services.