T-Mobile Price Lock Lawsuit: Judge Orders Individual Arbitration

At the center of this case is a claim that T-Mobile promised certain customers their plan rates were "guaranteed to last for life or as long as the customer wanted to remain with that plan," then raised those rates beginning in May 2024. Five customers sued on behalf of themselves and a proposed nationwide class, alleging fraud, negligent misrepresentation, false advertising, and violations of multiple state consumer protection laws.

T-Mobile countered that every version of its Terms and Conditions in effect since these customers signed up contained an arbitration clause, a class action waiver, and a chance to opt out. The company asked the court to move the dispute out of the courtroom and into private, individual arbitration.

On September 29, 2026, the court sided with T-Mobile. The judge determined that all five customers had accepted the 2023 Terms and Conditions simply by continuing to use and pay for service after receiving email notice that doing so would bind them to those terms, and that three of the five had also signed separate arbitration agreements. As a result, the case was sent to arbitration and the court proceedings were paused.

Importantly, this ruling does not decide whether the customers are right that T-Mobile broke its rate promises, nor does it resolve whether any of their attempts to opt out of arbitration were valid. The judge left both questions for an arbitrator to sort out.

There's no action for consumers to take or sign up for. The case will proceed through the American Arbitration Association under its Consumer Arbitration Rules. The parties are required to report back to the court on the arbitration's progress within 90 days, and if arbitration hasn't started within 12 months, the court will dismiss the claims and close the case.