Verizon said thousands of people who were affected nationwide by a massive outage now have service back.

If your Verizon-backed phone was out most of yesterday or even still down today, you weren’t alone. The company said the blackout was caused by a “software issue” but did not respond to a request to elaborate on what exactly that meant.

Verizon officials assured customers that their engineers were actively engaged in diagnosing and resolving the service disruption. By early evening, the company announced that service was beginning to stabilize in affected regions.

According to Downdetector data , most networks in the New York City, Houston, Chicago, Seattle, the Bay Area, and other major urban centers had been restored by 7:30 p.m. PDT, though a residual few hundred reports of outag

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