Some iPhone users have seen SOS messages displayed in the status bar on their cellphones. The message indicates that the device is having trouble connecting to their cellular provider’s network, but it can make emergency calls through other carrier networks, according to Apple Support.

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Here are where outage numbers stand by provider as of 10 a.m., according to Downdetector, which gathers its information from user-submitted reports, data on social media and other key indicators. 

AT&T: 65,800

Cricket Wireless: 10,400

Verizon: 3,200

T-Mobile: 1,700

Boost: 800

UScellular: 500

Prepaid wireless service provider Cricket Wireless, which is owned by AT&T and uses its networks, is also experiencing outages this morning. 

More than 13,500 customers reported outages around 8 a.m., according to Downdetector. The number has since dipped to 11,500 as of 9:30 a.m. 

Cricket was responding to customer complaints on X by saying: "Allow us to explain that there is a nationwide network incident impacting multiple services. It is Cricket’s top priority to restore service to full capacity as quickly and safely as possible. We apologize for any inconvenience this has caused."

The AT&T customer outages started early with about 32,000 customers reporting outages as of 4 a.m. ET, according to tracking site Downdetector.

That number dipped to about 23,000 at 6 a.m., but spiked again hitting 74,000 around 8 a.m.

As of 10 a.m., the number of outages remains around 72,000. 

AT&T’s 5G network reaches 290 million people across the U.S., according to the company’s website. 

Massachusetts State Police urged those in the state against calling 911 to test if their cell service is working.

"Many 911 centers in the state are getting flooded w/ calls from people trying to see if 911 works from their cell phone," it said in a post on X. "Please do not do this."

Atlanta Mayor Andre Dickens said city officials are "aware that AT&T is having cellular outages this week" and are "actively gathering information" about how the city can assist in resolving the outages.

Outages appear to be widespread in Atlanta, according to the tracking site Downdetector.

Dickens noted that Atlanta's e-911 is able to "receive inbound and make outbound calls."

T-Mobile said Downdetector numbers likely reflect customers attempting to reach users on other networks.

"We did not experience an outage," the company said in a statement. "Our network is operating normally."

Verizon said that the outages are not affecting its network directly, but customers trying to reach another carrier are experiencing issues. 

“We are continuing to monitor the situation,” the company said.

AT&T said it is "working urgently to restore service" to customers affected by this morning's outage.

Until then, customers should use Wi-Fi calling, the company said in a statement.

Cricket Wireless, which is owned by AT&T, released an identical statement.