T-Mobile USA has begun throttling mobile hotspot data when its network is congested while giving priority to smartphones and other devices that connect directly to the cellular network.
T-Mobile has been notifying customers of the change yesterday and today with a message that says, "We just made your network better again" and that "T-Mobile device data comes first."
"We've primed the network for on-device use," the carrier says on its website. "So now when there's congestion, you may notice higher speeds for data on your T-Mobile devices versus Smartphone Mobile Hotspot (tethering)." Prioritization of on-device data is triggered "at times and at locations where there are competing customer demands for network resources, which may result in slower tethering speeds," T-Mobile also says.