It used 8GB of cellular data within one day!

It used 8GB of cellular data within one day!

Last night I checked sent data was below 100MB, recieved data was below 400MB.

Today, when I checked it after work.

Sent 4.0GB, Recieved 4.4GB.

***?! within one day!

All I used was some radio application for less than one hour.

The iPad was in a sleep mode most of the time because I was at work.

I've been using push fucntion for over 3 weeks so I don't think that was the problem.

And iPad doesn't support making wifi hot spot from 3G network.

Why is it showing that? this must be an error. wouldn't it?

If this is true I'd have to pay 250$. holly s***!

What kind of function would upload 4GB of data within one day?