T-Mobile pays $31.5 million FCC settlement over 4 data breaches

**Executive summary:** The FCC announced a $31.5 million settlement with T‑Mobile resolving investigations into multiple data breaches from 2021–2023 — including a 2023 API incident affecting millions of accounts — requiring $15.75M in cybersecurity investments, a $15.75M civil penalty, and commitments to adopt measures such as zero‑trust architecture, multi‑factor authentication, data minimization, improved asset tracking, and independent security audits to reduce future compromises.