BELLEVUE, Washington – Customers of wireless carrier T-Mobile US Inc. reported widespread service outages in the U.S. Monday night, according to Web sites that track service disruptions.

Posts on Downdetector.com and Product-Reviews.net indicated T-Mobile service outages in several areas of the country. Many Twitter users also reported outages.

Numerous user posts said their service had been switched to “SOS mode,” meaning they were not directly connected to a network but could still make emergency calls.

T-Mobile’s president of technology, Neville Ray, issued a statement about the outage on Twitter early Tuesday.

“We have seen significant improvement and are operating at near normal levels,” Ray said. “Our teams continue to monitor and we greatly appreciate everyone’s patience. We apologize for any impact this issue may have had for our customers.”

The company did not immediately provide details on the cause or extent of the outage.

Downdetector.com provided a graph tracking service complaints over the previous 24 hours, indicating a peak of more than 69,000 reported outages in a two-hour period.

Comments posted on the site came from users who said they were located in Arizona, California, Colorado, Florida, Hawaii, Kansas, Nebraska, North Carolina, Oklahoma, Texas and Washington.

Similar service complaints on Product-Reviews.net originated in some of the same states, as well as Alabama, Connecticut, Idaho, Minnesota, New York, Nevada, South Carolina and others.

Many publications reported that service was eventually restored.

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