The United States cellular network struggled the morning of February 22

A 5G signal meter on an iPhone 12

So far, it's not clear why T-Mobile, AT&T, and Verizon are all having issues this morning. Symptoms vary, with no connectivity at all for the most impacted.

In some cases with an iPhone 14 or iPhone 15, users are seeing the SOS notification in the upper-right hand corner of the screen where the signal strength meter normally is. That's an indicator of no cell service, but users still have access to the SOS over Satellite feature.

The issues appear to have started at or around 4:00 AM ET on February 22. Social media reports increased in volume as the east coast woke up, with more and more coming in as the morning progresses.

"Some of our customers are experiencing wireless service interruptions this morning," AT&T said in a statement. "We are working urgently to restore service to them. We encourage the use of Wi-Fi calling until service is restored."

Verizon and T-Mobile say that their networks are functioning fine. This is belied by users on social media saying that they have no connectivity at all, though.

"Verizon's network is operating normally. Some customers experienced issues this morning when calling or texting with customers served by another carrier," Verizon also said in a statement. "We are continuing to monitor the situation."

Additionally, while wireless-provided internet like 5G for the home is hit, wired internet services provided by the companies don't seem to be impacted.

The problems extend to mobile virtual network operators that piggyback off the larger carriers — or NVMOs. Boost, Consumer Cellular, Straight Talk, US Cellular, FirstNet, and Boost Infinite are all reporting problems as well.

Update Feb 22, 3:51 PM ETAT&T reports that it has restored all users, but has yet to comment on the root cause.