FILE PHOTO: A T-Mobile logo is advertised on a building sign in Los Angeles, California, U.S., May 11, 2017. REUTERS/Mike Blake/File Photo
(Reuters) - T-Mobile's network was among the systems hacked in a damaging Chinese cyber-espionage operation that successfully gained entry into multiple U.S. and international telecommunications companies, The Wall Street Journal reported on Friday citing people familiar with the matter.
(Reporting by Urvi Dugar; Editing by Sandra Maler)
