Below I copied and pasted something I posted else where. I figured it would help explain the billing a little.

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I sure am glad I got my 4G Ipad. Now on this plan I can walk around and have 4G speed on my Iphone with no extra cost for the Mobile Hot Spot. In reality to me, this plan doesnt save me money, but it does give me benefits I did not have before at no extra cost. I may even save like 2 - 3 bucks if I try hard enough.

This only hurts hardcore users. Will make them switch (more bandwidth for me) or move to Wifi spots more.

Right now I have 1400 minutes, 1000 msgs on both phones, and an extra dummy phone that is 9.99.

Msgs 20.00

1400 80.00

Data 60.00

Lines 30.00

so that is 190.

I did a check on my usage. We never go over 3 Gbs a month. So i could probably get by on a 4 Gb, But probably will go 6 for possible increase since ill have 4G. So, lets do that math.

Lines 80

Data 80

Tablet 10

That is 170.

That is a SAVINGS of 20 bucks (really 10, because my dummy phone for 10 bucks isnt included as I will get rid of it) and i also get to use my 4G iPad as a mobile hotspot. That means I can use my Mac Air when I want to as well.

I could probably save another 10 bucks by dropping it to 4 GB, which I may after i check my usage.

I am going to jump on this plan as soon as it hits.