Except I only do device management because the limited data plan is a problem that doesn't go away - and you have it too, because you're limited to 6 GB and that's not much.
This month I've been following the Coursera course on functional programming with Scala, while listening to other podcasts and stuff I follow. I like doing that in the morning, while drinking a coffee at a nice place. And because I wasn't careful about turning Wifi on (it was off for some reason), I depleted 2 GB of bandwidth in 2 hours, which was the bandwidth I had left - the connection was so good I didn't even realize that I was on 3G.
Also, I'm probably in a much better position than most people, because my monthly plan does not come with a contract, being a PrePay (PrePay plans are very competitive in Europe, especially Eastern Europe, compared to the US at least). So I can recharge as needed.
But other people are not so lucky and once you blow past the allocated bandwidth, the prices are freaking huge on a contract. I have an acquaintance who's kid watched movies on his phone and ended up with a 300 EUR bill.
So btw, if you're telling me that you don't do device management, just wait until you'll be a father.