Overview

• CFIUS found T-Mobile failed to prevent and report unauthorized data access in 2020 and 2021.
• The breaches involved data from law enforcement information requests but did not impact customer information.
• T-Mobile attributed the breaches to technical issues during its integration with Sprint.
• This is part of an increasing trend of CFIUS imposing more frequent and severe penalties.
• T-Mobile is also in the process of acquiring US Cellular for $4.4 billion.