It seems like every iPhone I've ever had seemed to upload a lot as well even when it was new. While I don't have any way of verifying what was being uploaded, I know there weren't any photos, apps, or music to backup. So why would it be uploading so much data? In any case, I'd be very leery of device that cost $10 or $1,000 that is uploading gigabytes of data in a quarter of a day. There's no obvious or good purpose for such an action.
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