Unfortunately for AT&T users who have grandfathered unlimited tablet data plans, the carrier is planning to follow the same concept onto these plans. According to the carrier, they are in the process of getting in touch with affected tablet data plan users to inform them of the new policy change being put in place. The carrier shares that starting May 24th, these customers will also be susceptible to data deprioritization once the monthly data cap of 22GB has been used up.
Data deprioritization happens once the user experiences reduced speeds in data and an increased latency in a congested network. Once the user moves to an uncongested network or the congestion ends, the speed and latency will normalize.
This policy change for AT&T unlimited tablet data plans is something many do not consider new. The same data deprioritization policy is implemented with the carrier's unlimited smartphone data customers. If anything, it's a surprise that it took the carrier this long before taking this initiative with grandfathered plans. But at least AT&T is giving these users a heads up about the policy change.