I'm not talking about every last bit...but having half of my allotment remaining at the end of the month makes me feel like I am wasting money. AT&T already charges out the butt for data...I'm not one to give them my money for nothing.
When I was on an unlimited minutes plan with Suncom on my old dumbphone, I had tried to get out of contract a month early and was refused, so I called my mom and left the phone on the call for the entire month, just to stick it to em.