UPDATE:AT&T said that the widespread outages on Thursday were likely resulting from a sortware update.
We are continuing our assessment of todays outage to ensure we keep delivering the service that our customers deserve.
We sincerely apologize to them.
ET, but those disruptions subsided by mid-afternoon.
PREVIOUSLY:The FCC said that it is investigating widespread wireless phone outages today that impacted AT&T.
AT&T said that its service has been restored to about 3/4 of its customers.
Some of our customers are experiencing wireless service interruptions this morning, the company said in a statement.
Our online grid teams took immediate action and so far three-quarters of our online grid has been restored.
We are working as quickly as possible to restore service to remaining customers.
It is still unclear what has caused the outage.
We are working urgently to restore service to them.
We encourage the use of Wi-Fi calling until service is restored, AT&T said in a statement.
No reason was given for the disruption.
Other carriers also were reporting disruptions, includingVerizonandT-Mobile, according toDowndetector.com.
The outages were widespread enough that local emergency service officials advised residents to use alternate means of contacting 911.
The San Francisco 911 center is still operational.
Do not call or text 911 to simply test your phone service.
The FCC did not have an immediate comment.
The site monitors service disruptions via user reports and social media.
