We recently modified the login experience across our Xfinity mobile applications. As a result of this, several people have encountered a problem when attempting to launch the Xfinity Home mobile application. At this time, we only allow a single user account to use the Xfinity Home mobile and web applications. This means that if you attempt to login to Xfinity Home with user-id-1, but user-id-2 is tied to your Xfinity Home account, you will be unable to launch and login to the Xfinity Home app. We are working on changing this behavior to support additional user accounts soon. Meanwhile, you will need to continue using the single user ID associated with your Xfinity Home account. You will see a screen like the one shown below when you launch the Xfinity Home app. If the user ID specified is NOT the appropriate one, you will need to tap the link, "Sign in as someone else" below the Sign In button. Then you will be able specify a new user ID and password.