Using 10MB data pro minute since two days, how is this possible

My iphone 4 is using pro minute 10 mb data. This is since two days.I do not know how this is possible. An i do not know how to stop this.

I really do not know. I went to a i center. They do not know how to help me. I have a few apps. Not a lot. It started wednesday at 12:09. I think that I was driving at that moment in my car.

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