South Korea has fined Samsung close to 15 million dollars after regulators found the company misled buyers about how well some Galaxy phones and tablets would perform when playing games. The penalty was announced by the country’s Fair Trade Commission on October 27, and it revives a long-running dispute about the company’s gaming software, years after the phones at the centre of the case first went on sale.
The fine, set at 20.1 billion won, applies to advertising for the Galaxy S21 series, the Galaxy S22 series and the Galaxy Tab S8 series. According to the regulator, Samsung promoted these devices as built for high-end gaming while failing to tell customers about a built-in feature that quietly held back their speed. Alongside the penalty, the commission ordered the company to correct its advertising practices, which goes directly to what buyers were told before they spent their money.
At the heart of the case is software called the Game Optimizing Service, better known as GOS. Samsung built it into its devices to manage heat and keep performance steady during gaming, a genuine problem, since modern phones pack enormous power into a thin body with no fan. The regulator’s complaint is not that Samsung tried to manage heat. It is that the company sold the phones on their gaming strength while saying nothing about GOS automatically reducing the power of the processor and graphics chip as soon as demanding games were opened, whether or not the device was actually running hot.
For buyers, that gap showed up in everyday use. Players reported lag, freezing and weaker graphics in games the phones were supposedly designed to handle with ease. For people who chose one model over another because of its gaming claims, that changes the value of what they bought. The commission found Samsung’s advertising highlighted gaming ability while leaving out information that would have mattered to anyone weighing up the purchase, and said the misleading advertisements ran from January 2021 to March 2022.
The dispute exploded in public in 2022, when the Galaxy S22 series reached customers and users noticed performance in popular games did not match the marketing. Gamers compared frame rates and shared their own tests online until the story could no longer be ignored. Samsung responded in March 2022 with an update allowing users to bypass the GOS limits. That calmed the immediate anger, but it did not settle whether the original advertising had been fair, and the regulator has now answered that question against the company.
Samsung has rejected the commission’s findings and intends to challenge the penalty in court. The company argues GOS was created to control heat and keep performance stable during long gaming sessions, not to deceive anyone, and that managing heat is a problem every smartphone maker faces. In its account, the software was meant to improve gaming by preventing overheating, and the March 2022 update showed it was willing to give users control. The regulator took those efforts into account when setting the fine.
The fine is not the first legal fallout from the GOS affair. Around 1,800 Galaxy S22 users in South Korea sued seeking compensation, arguing they had paid for performance they did not receive. In June 2025, a South Korean court acknowledged concerns about the advertising but dismissed the claims, finding the users had not sufficiently demonstrated financial harm. That case was later concluded through court-led mediation in 2026, and similar lawsuits elsewhere were withdrawn. Samsung maintains no court has established compensable losses, but the commission’s decision rests on a different test: not whether buyers can prove a precise loss, but whether they were properly informed when the product was sold.
That distinction is why this case will be watched well beyond South Korea. Regulators everywhere are scrutinising phone makers’ advertising claims, especially when background software can change how a device behaves after it leaves the shop. Headline specifications describe what hardware can do in theory, but thermal management shapes what it actually does in a customer’s hand. When such features limit performance, consumer protection law generally expects the limitation to be disclosed, not buried.
For Samsung, the stakes go beyond a single fine. It sells more smartphones than any other manufacturer, and its Galaxy S series carries much of its reputation. Gamers are among the most demanding and vocal of phone buyers, and they remember controversies like this for years. A misleading-advertising finding therefore carries a reputational cost that outlasts the payment, even though 20.1 billion won is manageable for a company of Samsung’s size.
What happens next depends on Samsung’s promised legal challenge. If the courts uphold the commission, the correction order will stand and the fine will be paid, closing a chapter that began with phones launched five years ago. If Samsung succeeds, it will argue the case proves its software was a legitimate engineering choice rather than a deception. Either way, the episode offers a clear lesson for the industry: when a device is sold on performance, anything that deliberately holds that performance back must be part of the story told to the buyer, not a detail discovered only after purchase.
