Sign in with your email or username and password to access your Xfinity account., To sign in, use your Xfinity ID (email, mobile, username) on the Xfinity app or in your account. You can also say “my account” into your Xfinity Voice Remote to see it on your X1 TV Box., Save on Xfinity Digital Cable TV, High Speed Internet and Home Phone Services. Enjoy entertainment your way with great deals on Xfinity by Comcast., Get online support for Xfinity products & services. Find help & support articles, chat online, or schedule a call with an agent., Sign in to Xfinity to manage your account and access services like TV, internet, phone, and home security., Comcast Customer Service is here to provide Help and Support for your Xfinity Internet, TV, Voice, Home and other services..