>This functionality was big with Nextel phones/service in the early cellular era. as one of the fossils who was a subscriber to Nextel, I feel compelled to men

>This functionality was big with Nextel phones/service in the early cellular era. as one of the fossils who was a subscriber to Nextel, I feel compelled to mention that the Motorola TAC phones were like 30 years earlier; the 'early cellular era' had been underway for some time before Nextel.