A group legal claim is being pursued against the UK's major mobile operators—EE, O2, Three, and Vodafone—alleging overcharging of customers. The claim asserts that these companies continued to charge customers the same rates even after their handset costs were paid off, instead of transitioning them to cheaper SIM-only deals. The legal action, led by Justin Guttman, seeks to represent 4.8 million people who purchased mobile contracts from these operators between 2007 and 2023. The claim aims to recoup over £3 billion, potentially resulting in payouts of up to £1,800 per person. Eligible individuals, residing in the UK and meeting specified contract criteria, do not need to opt in at this stage. The claim is supported by litigation funder LCM Funding UK Ltd, and participants will not incur any costs unless the claim is successful. The Competition Appeal Tribunal will determine whether the claim can proceed, and even if approved, resolution may not occur until 2026 or later.