It’s common knowledge that the grandfathered unlimited data plans from AT&T aren’t exactly unlimited because the carrier heavily throttles speeds after users cross 5GB of usage in a single month. The throttling limits are then put in place until the next billing cycle and once the 5GB per month mark is hit users get throttled once again. It looks like AT&T has quietly removed automatic throttling limits on its unlimited 4G data plans.
Previously the carrier used to aggressively throttle speeds once the 5GB limit was reached. It didn’t matter if the user was in a congested area or if they were only throttled due to excessive traffic on the network.
AT&T didn’t do much to bring attention to the fact that it has changed its throttling policy with regards to grandfathered unlimited 4G data plans. The change is evident on the carrier’s website though, which now states that AT&T users “may experience reduced speeds when using data services at times and in areas that are experiencing network congestion.”
While the 5GB per month limit remains AT&T has now made it clear that users won’t automatically be throttled at all times when the limit is reached. They may only experience reduced speeds if there’s network congestion. If they’re not in a congested area they probably won’t even notice throttling at all regardless of whether or not their 5GB limit has been reached.