An anonymous reader quotes a report from Ars Technica: The Supreme Court will hear a case that could invalidate the Federal Communications Commission's authority to issue fines against companies regulated by the FCC. AT&T, Verizon, and T-Mobile challenged the FCC's ability to punish them after the commission fined the carriers for selling customer location data without their users' consent. AT&T convinced the US Court of Appeals for the 5th Circuit to overturn its fine (PDF), while Verizon lost in the 2nd Circuit and T-Mobile lost in the District of Columbia Circuit. Verizon petitioned (PDF) the Supreme Court to reverse its loss, while the FCC and Justice Department petitioned (PDF) the court to overturn AT&T's victory in the 5th Circuit. The Supreme Court granted both petitions to hear the challenges and consolidated the cases in a list of orders (PDF) released Friday. Oral arguments will be held. In 2024, the FCC fined the big three carriers a total of $196 million for location data sales revealed in 2018, saying the companies were punished "for illegally sharing access to customers' location information without consent and without taking reasonable measures to protect that information against unauthorized disclosure." Carriers challenged in three appeals courts, arguing that the fines violated their Seventh Amendment right to a jury trial. [...] While the Supreme Court is only taking up the AT&T and Verizon cases, the T-Mobile case would be affected by whatever ruling the Supreme Court issues. T-Mobile is seeking a rehearing in the District of Columbia Circuit, an effort that could be boosted or rendered moot by whatever the Supreme Court decides.Read more of this story at Slashdot.