AT&T explains 2GB throttling of unlimited data plans

Yea AT&T... explain how you throttle unlimited... explain that to me... 

AT&T had to explain its data throttling practices after news broke that some of its unlimited data customers were being slapped with slow data speeds after using only 2GB of data. The unlimited data plans were discontinued back in 2010, replaced by tiered plans, but some customers have been grandfathered in. AT&T then announced a new throttling policy that began last October, but said the change would only affect the top five percent of its heaviest data users. 

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