Back when the first iPhone launched, AT&T was selling unlimited data packages as a perk and there are still millions of customers on the grandfathered package, which should in theory offer completely unlimited data whether you use 100 MB or 100 GB.
Unfortunately for AT&T unlimited users, the last few years have seen their data throttled after 5GB no matter what, even though AT&T's own policy stated that throttling would only occur in times of network congestion.
The new policy allows up to 22GB of data per month, uninterrupted, afterwards which AT&T can throttle if there is network congestion. This follows in the new net neutrality rules that allow for "reasonable network management" although AT&T is likely only making the move because the FCC has proposed a $100 million fine for the carrier's abusive throttling for unlimited data subscribers.
Written by: Andre Yoskowitz @ 16 Sep 2015 13:58