Jan 15 (Reuters) – Verizon Communications (VZ.N), opens new tab said on Thursday it is offering a $20 credit to hundreds of thousands of customers impacted by its 10-hour outage on Wednesday that the U.S. wireless company said was caused by a software issue.

Verizon said the issue primarily impacted customers in the northeast, southern California, Texas and pockets of the Midwest and was not the result of a cyberattack. The issue was resolved around 10 p.m. EST (0300 GMT) Wednesday.

The Federal Communications Commission said it would review the outage.

“We did not meet the standard of excellence our customers expect and that we expect of ourselves. To help provide some relief to those affected, we are giving customers a $20 account credit,” Verizon said.

The company added “if customers are still experiencing issues, we encourage them to restart their devices to reconnect to the network.”

The outage prompted several major cities to advise residents to use other carriers to call emergency services. Downdetector, which aggregates data on service outages, said late Wednesday it had received 2.2 million reports over the last 24 hours related to the Verizon service disruption.

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