This little device uses a micro USB cable to connect to your phone. Then install an app which allows you to pick up the video from your quad.
You can record DVR footage right to your mobile phone or stream your phone screen live to Facebook so others can watch you fly live.

To Auto scan. hold down the button for a few seconds to begin scanning.
It will display the stronger and weaker signals.
It will pick up all channels so you it doesn't matter if you're using raceband etc.

To change frequencies one at a time, simply tap the button once.
*I have not verified if this works on Apple.*

The best app we have found is below:

https://play.google.com/store/apps/details?id=com.shenyaocn.android.FPVDroid

USB OTG video receiver

$40.00Price