[Skip to content](https://www.t-mobile.com/news/network/cybersecurity-incident-update-august-2021#maincontent) [Newsroom](https://www.t-mobile.com/news)Toggle secondary navigation - [Network](https://www.t-mobile.com/news/category/network) - [Devices](https://www.t-mobile.com/news/category/devices) - [Un-carrier](https://www.t-mobile.com/news/category/un-carrier) - [Community](https://www.t-mobile.com/news/category/community) - [Offers](https://www.t-mobile.com/news/category/offers) - [Business](https://www.t-mobile.com/news/category/business) English [NetworkCategory](https://www.t-mobile.com/news/category/network)[Statement](https://www.t-mobile.com/news/statement) # T‑Mobile Cybersecurity Incident Update August 16, 2021 1 min read - Facebook IconShare on Facebook - Share on Twitter - LinkedIn IconShare on LinkedIn We have been working around the clock to investigate claims being made that T‑Mobile data may have been illegally accessed. We take the protection of our customers very seriously and we are conducting an extensive analysis alongside digital forensic experts to understand the validity of these claims, and we are coordinating with law enforcement. We have determined that unauthorized access to some T‑Mobile data occurred, however we have not yet determined that there is any personal customer data involved. We are confident that the entry point used to gain access has been closed, and we are continuing our deep technical review of the situation across our systems to identify the nature of any data that was illegally accessed. This investigation will take some time but we are working with the highest degree of urgency. Until we have completed this assessment we cannot confirm the reported number of records affected or the validity of statements made by others. We understand that customers will have questions and concerns, and resolving those is critically important to us. Once we have a more complete and verified understanding of what occurred, we will [proactively communicate](https://www.t-mobile.com/brand/data-breach-2021) with our customers and other stakeholders. Tags[Consumer](https://www.t-mobile.com/news/archive/consumer) ## Related Stories [More Stories](https://www.t-mobile.com/news/category/network) [![Two women smiling while looking at a phone](https://www.t-mobile.com/news/_admin/uploads/2026/09/NPI-910-HERO-500x250.png) \ DevicesStory \ __5 Reasons T‑Mobile Members Get the Best iPhone 18 Pro Experience__ \ September 12, 2026|7 min read](https://www.t-mobile.com/news/devices/t-mobile-is-the-best-iphone-18-experience) [![Get iPhone 18 Pro on Us at T‑Mobile — America’s Best Network](https://www.t-mobile.com/news/_admin/uploads/2026/09/T-Mobile-iPhone-18-pro-NR-500x250.png) \ DevicesPress Release \ __Get iPhone 18 Pro on Us at T‑Mobile — America’s Best Network__   \ September 10, 2026|17 min read](https://www.t-mobile.com/news/devices/iphone-18-pro-iphone-duo-apple-watch-release) [![T-Mobile rolling out generators](https://www.t-mobile.com/news/_admin/uploads/2024/07/Generator-Rollout-500x250.jpg) \ NetworkPress Release \ __T‑Mobile Prepares for and Responds to Hurricane Lowell in Hawaiʻi (Updated 9/14/26)__  \ September 05, 2026|5 min read](https://www.t-mobile.com/news/network/t-mobile-positions-crews-and-resources-across-hawaii-ahead-of-hurricane-lowell) [![T-Mobile teams monitoring for storms](https://www.t-mobile.com/news/_admin/uploads/2026/05/T-Mobile_BOC_Monitoring-500x250.jpg) \ NetworkPress Release \ __T‑Mobile Monitoring and Ready to Respond to Tropical Storm Edouard (Updated 9/2/26)__  \ September 01, 2026|3 min read](https://www.t-mobile.com/news/network/t-mobile-monitoring-and-ready-to-respond-to-tropical-storm-edouard)