A massive outage left many T-Mobile USA customers across the country unable to make calls or get data on their cellular phones on Tuesday.

In a statement, T-Mobile said it is working to get its service back up and running.

"T-Mobile customers may be experiencing service disruptions impacting voice and data," the company said in a statement. "Our rapid response teams have been mobilized to restore service as quickly as possible. We will provide updates as more information is available."

The move comes as the carrier is still working to restore data to T-Mobile Sidekick users, many of whom have been without some or all of their information for an entire month.

In a statement on Friday, T-Mobile said many of its Sidekick customers have been able to restore at least their contacts, although it acknowledged not everyone got their address books back.

"There was a very small group of customers for whom we were unable