AT&T on Friday responded to claims that it throttles the data speeds of smartphone users on tiered data plans once their monthly data allotment has been surpassed. A report from TechSpot on Thursday claimed that AT&T users on tiered data plans were not just being charged overages when their soft caps were exceeded, but also hit with reduced data speeds until their current billing periods ended. An AT&T spokesperson confirmed to BGR via email that this is not the case, however. As BGR reported in July, data-speed throttling applies only to smartphone users with grandfathered unlimited data plans, the spokesperson confirmed. Subscribers with AT&T’s newer tiered data plans are charged overages when they exceed their monthly data allotment in a single billing period, but their throughput is not affected.