Turn on the TV and the Comcast/Xfinity cable box
Insert fresh batteries into the remote
Press and hold the Setup button until the LED changes from red to green
Enter the 5-digit TV code for your TV brand
Press the Power button to test the remote
If the TV turns off, press Setup to lock in the code
If the TV does not turn off, repeat with the next code for your TV brand
To pair an Xfinity Voice Remote, press and hold the A and D buttons until the light turns green
Enter the 3-digit on-screen pairing code if prompted
Follow the on-screen instructions to finish pairing
Test volume, power, and channel buttons
If needed, repeat the setup process for the cable box or audio device
Use the Xfinity remote setup page or the code list for your specific remote model if the first code does not work