Then how come I have the $15 unlimited data plan and I just synced with my work's Exchange server today?
If you have unlimited data you can do it. It's probably one of those things where the context gets them to charge more because they can. Kind of like how ATT will charge more for unlimited data if you have a PPC or smartphone. I guess they argue that businesses will use it more and can afford it. I'm glad they didn't try to pull that crap on me. That $15 unlimited data is what's kept me on Sprint for so long!