T-Mobile’s network was among the systems hacked in a damaging Chinese
  cyber-espionage operation that gained entry into multiple US 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,
  without saying when the attack took place.

  “T-Mobile is closely monitoring this industry-wide attack,” a company
  spokesperson told Reuters in an email.
  T-Mobile's network was among the systems hacked in a
  damaging Chinese cyber-espionage operation that gained entry into
  multiple US and international telecommunications companies. T-Mobile’s
  network was among the systems hacked in a damaging Chinese
  cyber-espionage operation that gained entry into multiple US and
  international telecommunications companies. REUTERS

  “At this time, T-Mobile systems and data have not been impacted in any
  significant way, and we have no evidence of impacts to customer
  information.”

  It was unclear what information, if any, was taken about T-Mobile
  customers’ calls and communications records, according to the WSJ
  report.

  On Wednesday, The Federal Bureau of Investigation (FBI) and the US
  cyber watchdog agency CISA said China-linked hackers have intercepted
  surveillance data intended for American law enforcement agencies after
  breaking into an unspecified number of telecom companies.

  Earlier in October, the Journal reported that Chinese hackers accessed
  the networks of US broadband providers, including Verizon
  Communications, AT&T and Lumen Technologies and obtained information
  from systems the federal government uses for court-authorized
  wiretapping.

  Beijing has previously denied claims by the US government and others
  that it has used hackers to break into foreign computer systems.