The carrier joins a growing list of known victims, including AT&T and Verizon, of the major Chinese spying operation.

T-Mobile US Inc.’s network was among those recently breached by Chinese hackers in an attack on multiple telecommunications companies, the Wall Street Journal reported.

Mobile's network was among the systems hacked in a damaging Chinese cyber-espionage operation that gained entry into multiple U.S. and international telecommunications companies, The Wall Street Journal reported on Friday citing people familiar with the matter.

Hackers linked to a Chinese intelligence agency were able to breach T-Mobile as part of a monthslong campaign to spy on the cellphone communications of high-value intelligence targets, the Journal added,

T-Mobile, one of the biggest cellphone carriers in the United States, was targeted in a massive hacking attack linked to Chinese cyber-espionage. The hackers, believed to be connected to a Chinese intelligence agency,

T-Mobile's network was among the systems hacked in a damaging Chinese cyber-espionage operation that gained entry into multiple U.S. and international telecommunications companies, The Wall Street Journal reported Friday.