I stole my mother-in-laws upgrade (we pay for her phone service), and gave her one of my old phones, so I got to keep unlimited. Of course now my wife wants an S4, and wants to steal my upgrade, so I may be out unlimited data because I'll never hear the end of it otherwise! I may go to the 6gb share everything if that happens. My wife rarely uses over 300mb a month, and my MIL barely uses 100. So I'd have around 5.6GB left for me. I've never gone over 2GB since I have wifi access so often so I'd be good.