We have sprint too and noticed the same thing on our bill. Its wasn't 71 text messages, but it was like 20 text messages (which is about double or more our normal) + some data transfer or some crap that we never do and would have no reason to do. I've been meaning to go over it with our phones in hand to try to catch Sprint in a lie but now I'm definatley going to since I don't seem to be the only one.
Also gotta love how text messages were 10 cents when we signed up, 15 cents a month or two later and now its 20cents?!?! Give me a break.
