U.S. carriers halt Samsung Note 7 exchanges on safety concerns

SEOUL/BENGALURU (Reuters) - Two U.S. mobile carriers said they will stop issuing Samsung Electronics Co Ltd's new Galaxy Note 7 smartphones due to safety concerns, a further setback for the world's top smartphone maker trying to manage a growing recall crisis. AT&T Inc said on Sunday it will stop exchanging new Note 7 smartphones due to reports of fires from replacement devices that Samsung has said used safe batteries. Samsung in September announced a global recall of at least 2.5 million G