Is there any API to fetch an iPhone's internal data?

With iPhone's internal data I meant, for example, in general setting we have an option called usage which shows the amount of bytes that has been sent and received. I want 开发者_运维问答to fetch the amount of data that has been sent and received. Can any one help me in this?

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The iOS SDK only exposes a minimal set of device specific information. Most of this can be found in the UIDevice Class.

You can of course determine the network activity of your application, but I doubt that is what you are looking for.