American telco AT&T Inc stopped all sales of Samsung's flagship Galaxy Note 7 over concerns about the smartphone's safety.
"Based on recent reports, we're no longer exchanging new Note 7s at this time, pending further investigation of these reported incidents," AT&T spokesman Fletcher Cook said in an e-mailed statement on Sunday.
"We still encourage customers with a recalled Note 7 to visit an AT&T location to exchange that device for another Samsung smartphone or other smartphone of their choice."
Samsung started replacing the Note 7 last month because of a flaw in its lithium battery that can lead to overheating and pose a burn hazard to customers. Airlines have banned customers from using the smartphones on flights, and the evacuation of a Southwest Airlines Co. plane last week was blamed on smoke caused by a replacement device.
Like many competitors, the second-largest U.S. wireless carrier had been already offering alternative smartphones to people who return Note 7 devices. On Friday, Bloomberg News reported that AT&T was considering halting sales of the Note 7.