UPDATE, April 7, 3:15 p.m. ET: An AT&T spokesperson tells Mashable, "Technicians worked to quickly resolve the issue and about 95 percent of impacted channels are restored, with remaining channels coming back up. We apologize for this inconvenience."

AT&T's U-verse service began suffering significant service outages across the country on Monday.

U-verse, which delivers TV, phone and Internet service to roughly 10.7 million subscribers, began having issues at 11:20 a.m. EDT, according to DownDetector.com, which tracks dozens of popular online service providers and web sites.

U-verse customers took to Twitter where many expressed their frustration and dismay by posting pictures of their disconnected devices and outage maps.

.@Uverse any word on when services will be back up? This outage is insane! pic.twitter.com/zTf0G9y5Xw — Breanne Harris (@BreannePH) April 7, 2014

@Uverse no cable/internet and customer service phones are ringing busy?! What's going on? — Sean Terry (@sean7866002) April 7, 2014

@Uverse now our cable doesn't work at all. I've tried everything and get this screen every time. pic.twitter.com/uJWOTJhgC8 — Kari Kuroski (@kari_kuroski) April 7, 2014

Some looked to competing services, wondering if it was time for them to offer a sweet deal for switching.

@comcast do you have any great deals for people whose @Uverse is currently down? You guys could get some new customers with the right deal! — Paul Hulford (@PaulJHulford) April 7, 2014

Other customers are looking for service credit.

So @ATTCustomerCare @Uverse there will be a credit issued for this seemingly city wide outage that's lasted most of the morning, right? — Malinda Beeler (@malinda_b) April 7, 2014

As of 12:35 p.m. ET, neither AT&T's official U-verse Twitter account nor its customer service account had posted either an acknowledgement of the outage or an update on service status.

AT&T U-verse's customers are, according to the company's Q3, 2013 financial report, spread across 139 markets and 22 states.

Downdetector.com reported a huge uptick in service reports in the last hour. The site's map below shows the outage hotspots.

DownDetector.com's ATT outage map. Image: Downdetector

Not all three services are consistently down across the network. As U-verse subscriber Crystalle Berry, of Abita Springs, Louisiana, told Mashable,

"I was in the middle of watching FXHD when the movie froze then went to the default blue troubleshooting screen...I attempted to call AT&T and oddly enough got the ancient 'Your call couldn't be completed' message. That's when I Googled and discovered it was nationwide. Internet and phone are working great. Watching Netflix now while I wait.

When reached for comment, an AT&T spokesperson explained the outage, "Due to a power-related issue triggered by a third-party at our video hub, U-verse customers may be experiencing a loss of national channels. Technicians are working to resolve the issue and we expect to have service fully restored by early afternoon. We apologize for this inconvenience."

[ht: Geoff Fox]