AppleInsider readers, including Jon from Maryland, have reported a recent activation of FaceTime over cellular on both LTE and HSPA+, even those with grandfathered unlimited data plans. Previously, the company stated it would be activating the service in June for LTE devices only. So far, activation of the service has been verified in parts of New York, Maryland, Georgia, Louisiana, California and Hawaii. Voice and video quality is nearly on a par with the Wi-Fi implementation of the service, suggesting AT&T is not throttling those subscribers who choose to use the feature while on the go.
Back in January, AT&T had announced 'as a result of ongoing testing' that it would enable FaceTime over Cellular for all customers with a tiered data plan. The company initially tried to make the feature only available to those on Mobile Share plans but intense criticism and Net Neutrality complaints forced it to relax the restrictions.