The declaration follows recent news of an incident where Salt Typhoon, an infamous Chinese state-sponsored threat actor, breached T-Mobile's network in a cyber-espionage campaign on behalf of the country’s government.

The statement followed reports about "Salt Typhoon," a Chinese-linked cyberespionage operation targeting U.S. telecommunications firms. T-Mobile Chief Security Officer Jeff Simon said in a blog on the company's website Wednesday that the company detected ...

The phone giant said hackers did not access the contents or logs of customer phone calls or text messages, during an industry-wide attack on phone and internet companies.