T-Mobile says it’s working to fix widespread network issues

T-Mobile, one of the three largest mobile carriers in the U.S., said it’s working to fix a widespread “voice and data issue.”

The company’s president of technology, Neville Ray, tweeted Monday afternoon at around 4 p.m. ET that T-Mobile engineers hope to fix the problem soon.

The scope of the outage wasn’t clear, but Ray said it has affected customers around the country.” T-Mobile representatives did not reply to further questions.

People on Twitter complained that calls were not going through. The Redmond, Washington, police department tweeted that T-Mobile customers should have “an alternate plan in place in the event you need to call 911.”

AT&T and Verizon both said their networks were operating normally. But calls between their customers and T-Mobile customers could have problems because of T-Mobile’s issues.

T-Mobile became one of the country’s largest carriers, along with AT&T and Verizon, after buying rival Sprint. The company has started integrating the two networks.

The Federal Communications Commission, which oversees voice and data networks, said its public-safety bureau is looking into the problem.