Updated from 12:25 p.m. with a statement from Verizon.

Verizon (VZ) network suffered outages on Monday morning, with subscribers in New York and Atlanta reporting problems with the wireless service.

Mobile network monitoring site Outage.Report showed a spike in network issues from 8 a.m. to 10:40 a.m. on Monday. Atlanta TV station TXIA-TV also reported problems with Verizon calls Monday. Meanwhile, DownDetector.com showed outages in the Northeast and Southeast, with lesser network issues in San Francisco and Seattle. Verizon's own outage map showed issues in New York and the Atlanta metro region.

In a statement to TheStreet, the company said that "Verizon Wireless experienced interruption in voice service for some customers in a few markets this morning. Engineers were able to quickly identify and resolve the issue and service was restored by approximately 10:25 am Eastern."

Shares of Verizon were down about 1.1% Monday to $45.32 while the broad S&P 500 index was up 0.4%. 

Network superiority has long been a selling point for Verizon.

The influential wireless testing group RootMetrics gave the carrier top scores in its report on network performance in the second half of 2016. "Based on our testing, Verizon is the undisputed leader in terms of coverage and network reliability," RootMetrics wrote. Likewise, Verizon had the top ranking in each of the six of the U.S. regions where J.D. Power measured call, messaging and data quality, in a March report.

The telecom bowed to industry pressure in mid-February and began to offer an unlimited plan, as it lost subscribers. The major telecoms T-Mobile USA (TMUS) , Sprint (S) and AT&T (T)  all offer unlimited plans now.

The marketplace will get more crowded later this year, when Comcast (CMCSA)  starts to resells Verizon service. Charter (CHTR) also has a deal to resell Verizon's mobile offering.

Comcast is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells CMCSA? Learn more now.

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