If you want to watch it on your iPhone you will need to be a Verizon customer with a MORE Everything package. Install the NFL Mobile app to view the game on your phone.
To watch the game on your Apple TV the easiest solution is to AirPlay from your desktop or iOS device.
If you are an international viewer, you may want to try downloading the NFL Game Pass app. It offers a $9.99 Superbowl Pass letting international viewers watch the game on their device. Please note that the game is unavailable in select countries including Canada, the U.K., and the Republic of Ireland.
You can download NBC Sports Live Extra from the App Store for free.