According to the chart showing problems on downdetector.com, at least 600 reports of outages came in between 8 a.m. and 11 a.m. The number of reports continues to grow.
Some users in areas such as Spring, Cypress, Richmond, Tomball, and northeast Houston said they couldn't make outgoing calls.
Although they couldn't call out, others reported being able to text, receive calls and use data.
Overall, more than 3,000 outages have been reported in cities including Dallas, Austin, New York, Oklahoma City and Tampa.
Verizon tweeted that it's currently experiencing intermittent voice, text and data service interruptions for customers in some markets.
The company adds that its technicians are working diligently to resolve the issue.
We understand how important it is to have reliable service, and we are here to help. We are currently experiencing a wireless network issue in your area. Our technicians are aware of this issue and are working to resolve it quickly. Thank you for your patience. *AC— Verizon Wireless CS (@VZWSupport) September 25, 2018