Cellcom, a Wisconsin wireless provider, confirmed that a cyberattack caused a major service outage affecting voice and SMS services across Wisconsin and Upper Michigan. The company’s response included engaging cybersecurity experts, working to restore services, and assuring customers that their personal data was not compromised. #Cyberattack #Telecommunications #DataProtection
Keypoints
- Cellcom experienced a cyberattack that led to widespread service disruptions starting on May 14, 2025.
- The company initially claimed a technical issue but later confirmed a cyber incident involving a ransomware attack or similar breach.
- Cellcom responded by involving cybersecurity experts, notifying authorities, and working to restore services.
- Services such as voice calls and SMS are gradually being restored, with full recovery expected by the end of the week.
- Customers are advised to perform simple troubleshooting steps like toggling airplane mode or restarting their phones to recover services.