Days after a huge outage took down the social media service formerly known as Twitter, X is experiencing troubles again. Here's what to know.

Tess Coward, a 27-year-old PR professional based in New York City, woke up feeling under the weather on Wednesday. But without the ability to make phone calls or receive text messages, she couldn’t get in touch with her doctor or log into the provider’s patient portal.

While Downdetector did receive a spike in user error reports for T-Mobile and AT&T, at this time, Verizon seems to be the only major mobile carrier suffering an outage. In a statement on X, T-Mobile said that its network was functioning normally at this time.

Verizon says a software problem caused the glitch and it is conducting a postmortem, but experts say outages are "a fact of life" these days.

Verizon said it has resolved an hours-long outage that is believed to have left tens of thousands of US customers without access to voice and data services for much of Wednesday.

During the Verizon outage, police warned that contacting 911 could be tricky. Big disruptions can have cascading effects on everyday life.

When Cloudflare went down on Nov. 18, the disruption spread fast. According to Bloomberg, the outage began around 6:20 a.m. ET when Cloudflare detected a sudden spike in unusual traffic hitting one of its core services. That surge caused errors across the ...

Verizon Wireless said it will provide credits to customers after a widespread outage disrupted mobile communications.