I tend to ride the bus to work a few times a week, and it is roughly a 45 min trip. I'd like to use iTunes Radio occastionally, but I only have 1 gig of shared data between my wife and I (we both have wifi at home, work, parents homes, and so forth). I just don't want to eat up a ton of data and find out AFTER I go over my limit for the month. Has anyone tested to see on average how much is used for a set time frame? If it helps, I live in a city that has 4G LTE basically all over the place.