I have had smartphones with Verizon for years. My last one was the iPhone 4. I never went over 1 GB data with that phone. This month, I upgraded to the 5S and I blew through almost 4 gigs in two weeks! I do not watch videos, listen to music, or download anything. My usage has not changed in any way whatsoever; I simply check mail and occasionally hit a search engine. What the hell is going on, Verizon??