Follow-Me Roaming

In the early days of mobile phone usage in the US, this feature offered users the ability to automatically forward calls to a roaming mobile that has left its primary service area. When the user left their home area, the follow-me roaming feature would tell the new local switch that they were on their network and inform their home switch to forward their calls. Without this feature, the calling party had to know the location of the roamer and place a call to that areas MTSO first (calling a 'port'), before calling the mobile. This sort of "follow me" roaming is now totally automatic across most of North America.