A:AnswerMirroring uses WiFi. If you want to use your iPhone's cellular data connection, you should be able to connect the Apple TV to a hotspot net your phone hosts.
A:AnswerHi Orange
Yes with this device you will be able to access your iTunes library. When you’re setting it up it will prompt you to put in the Apple ID and anything that is in your iCloud account will now be on your Apple TV.
A:AnswerIf Bay News 9 has an App, you should be able to watch it. Check with them.
You'll need an Apple TV for each TV you want to watch using it. Not only can you watch your iTunes movies, but NetFlix and YouTube and all sorts of other SmartTV sources are on it or can be added from the App Store.