NEW YORK - AT&T is adding a walkie-talkie-like application to the iPhone for its corporate customers, replicating a hallmark feature of the Nextel network, which is being shut down this summer.
AT&T has previously provided the "Push-to-Talk" on some other phones, including the Samsung Galaxy S III, a key competitor of the iPhone.
With push-to-talk systems, the user pushes a button to broadcast a voice message to a group. The service has been popular for work sites and first responders.
Sprint is shutting down the Nextel network this summer because it doesn't support data traffic. It's trying to get as many Nextel users as possible to switch to Sprint phones with push-to-talk capability, but it's competing with Verizon Wireless and AT&T.
AT&T's app is the first U.S. push-to-talk service for the iPhone.