If you recall, back in June, the FCC fined AT&T $100 million for misleading customers about their throttling policy. For at least 3 years prior, AT&T had been throttling data speeds for users connecting to overloaded/ congested cell towers. Remember that per net neutrality rules throttling is prohibited. However, mobile carriers are able to make adjustments in cases where they’re simply trying to minimize issues from heavy data users and maximize connectivity for users across the board.

For more details, check out the AT&T site for the official announcement.