Streaming local content from iPhone to Apple TV without WiFi or data connection I'm going on a trip abroad - where I will not have a data plan - to a place where there is no wifi. There is a TV, however, and I was thinking of bringing my 3rd gen Apple TV to be able to watch some media on the screen. The plan is to create a local hotspot on the phone; let the Apple TV connect to it and then use Airplay to play already downloaded content from my phone.

Will this work? I can't test it without the data plan without leaving the country.

This post discusses a similar issue, but they seem to have a working data connection.
Yes this works! 
You must switch on Bluetooth on both devices. 
Afterwards go to the Control Center and check if AirPlay is diplayed. When the AirPlay Button don't show up you might restart and try it again. When it's working you have to turn on 'Mirror'. That's it.