: Use the Xfinity Remote app or the Xfinity Stream app. These allow you to change channels and schedule DVR recordings directly from your phone.
If you are looking for an app because your physical remote isn't working, try these hardware resets first: arris-tv-box-remote-app
: If your Arris box runs on the Android TV platform, you can use the official Google TV app as a virtual remote. Third-Party Universal Remote Apps : Use the Xfinity Remote app or the Xfinity Stream app