A service outage has left Cellcom customers unable to make calls or send text messages. May 15, 2025. PC: Fox 11 Online
(WTAQ-WLUK) — Cellcom confirms a cyber incident caused the outage frustrating its customers for nearly a week.
A letter from CEO Brighid Riordan assures customers they are working around the clock to restore all services. She is hopeful the company will have them fully restored by the end of the week.
We experienced a cyber incident. While this is unfortunate, it’s not something we were unprepared for. We have protocols and plans in place for exactly this kind of situation. From the start, we’ve followed those plans — including engaging outside cybersecurity experts, notifying the FBI and Wisconsin officials, and working around the clock to bring systems safely back online. The incident was concentrated on an area of our network separate from where we store sensitive information related to you, our Cellcom/ Nsight family. We have no evidence that personal information related to you, your name, your addresses, your financial information, is impacted by this event.
Riordan says the incident was concentrated on an area of its network separate from where they store sensitive customer information, adding they have no evidence that personal information was impacted by the cyber incident.
While they would like to provide a timeline for full restoration, Riordan says they cannot share one with complete confidence.
Thanks to an incredible amount of hard work and tenacity, we achieved a major milestone last night. We are building on that success and expect to have the rest of service restored this week. Every part of this recovery is being handled with care and precision — we will not rush anything that compromises safety, security or trust.
Last week, voice and SMS services were impacted.
On Monday, the company made progress by restoring SMS texting and Cellcom-to-Cellcom phone calls.
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