If my Mobley has ever been throttled I wouldn't know it. I can stream movies with it and down load speeds are good enough for me.
Besides, if you are moving and are in a remote location your connection will be only as good as the nearest tower.
I have Sprint phone service, no throttling, unlimited and ability to tether my laptop and I can hardly make a call in the house. Finally complained and Sprint sent me a Magic Box which helps.
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi