To upgrade your plan to Commercial Free, simply follow the steps below.

On your Android device, launch the CBS app, then:

1. From the Menu, tap "Settings".
2. Tap "Upgrade" in Google Play.
3. You'll see the Change Subscription screen, and the Commercial Free subscription plan will be selected. Tap "Continue".
4. Tap "Subscribe". You'll then see a confirmation message that your subscription has been upgraded to Commercial Free. 

Your subscription will go into effect immediately, and you can stream your favorite CBS shows free from commercials!