I followed Gabesterino’s solution. Just unplug your Comcast/Xfinity box (you may want to mute your TV first) then follow the normal code setting directions: Point your Xfinity remote towards your TV and when it comes time to enter the TV code, enter 13899. Test it by powering off/on & volume. Your Comcast/ Xfinity remote then controls your TV functions as well. All in one remote!
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