I have a 3rd Gen AppleTV in my car hooked up to the nav via a hdmi to composite converter. I have a jailbroken iphone 5S that I use as mobile hotspot. I still have the "unlimited" data plan from AT&T in which they throttle me when going over 5GB. Well I have gone over my data threshold and they have slowed my data speed down to a crawl. This leads me to my question, if I change the display output to 640x480 as opposed to 1080 would I end using less data?