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Unfortunately, AT&T TV app is not included in the list of cast-enabled apps. If you're using an Android device, you may be able to mirror your phone screen to the Chromecast to watch content. You may check the following support articles for more information: Cast your Android screen: https://support.google.com/chromecast/answer/6059461 List of cast-enabled apps: https://store.google.com/us/product/gtv_apps_and_partners
Sorry, there was a problem. Please try again later.I'm not I just know you can add apple tv.
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