Using the Phone as the primary internet source

[pokerpot]

I traveled a lot last month and was tethering the whole time. I have no idea how it happened but when I looked at my bill it was 22 gigs!

I was so shocked and my heart stopped for a second but nothing came of it. Wonder how much you need to go over for Sprint to say something.

So I take it if I keep it at around 5-7 gigs per month I should be OK? I have three phones on my account and my girlfriend and brother never use data so seems fair enough to me that I get a little extra.