T-Mobile can slow down your data speeds during busy periods once you've used a certain amount of data each month, and can terminate your account entirely if they decide your usage is harming their network — even if you're on an 'unlimited' plan.
Even on unlimited plans, T-Mobile can slow your data speeds to unusable levels during busy periods, and customers whose usage T-Mobile deems excessive can be terminated — meaning the unlimited data advertised in T-Mobile's marketing materials comes with significant contractual exceptions.
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Compare across platforms →This clause explains why 'unlimited' T-Mobile data plans are not truly unlimited — your speeds can be throttled during congestion, and extreme usage can result in termination, which is material information for customers who depend on consistent high-speed data access.
REGULATORY FRAMEWORK: Network management and throttling practices are governed by the FCC's Open Internet rules, which were reinstated under Title II classification in 2024 (FCC-24-52). The FCC's transparency rules require clear disclosure of throttling practices at point of sale and in service descriptions. The FTC Act Section 5 applies to deceptive advertising of 'unlimited' data plans subject to undisclosed throttling — the FTC's 2019 enforcement action against AT&T Mobility LLC (FTC v. AT&T Mobility LLC, No. 3:14-cv-04785) established that throttling customers on unlimited plans without adequate disclosure violates Section 5. T-Mobile paid $48 million in 2020 to resolve FTC/FCC data throttling disclosure claims.
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