AT&T confusing some iPhone 4S buyers about unlimited data

This story was updated at 12:33 PT with a correction. The error message preventing iPhone 4S buyers from keeping their unlimited data plans was limited to the company's mobile site.

This story initially included incorrect information about how widespread an error message went. The error message preventing iPhone 4S buyers from keeping their unlimited data plans was limited to the company's mobile site.

Click here for update story.

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