
4S eSIM is a new global connectivity brand built by a team with strong experience in the telecommunications industry. Our partners provide direct network access to multiple mobile operators worldwide, giving us first-hand network resources and the ability to offer highly competitive pricing. We aim to make staying connected abroad simple, reliable, and affordable for everyone — from frequent travelers and digital nomads to business professionals and international students. With instant activation, flexible regional and global data plans, and no need for physical SIMs or complex KYC verification, 4S eSIM delivers a truly borderless mobile experience.
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Data plans for this provider are automatically updated. While we strive to keep the information accurate, we cannot guarantee its completeness or accuracy. Please confirm all details on the provider's official website or app before purchasing.
4S eSIM does not provide a truly unlimited high‑speed data plan for South Korea. All plans that carry the “Unlimited” label include a fixed data allowance—ranging from 3GB to 50GB—and the speed drops to 1000kbps once that limit is reached. For travelers who need a larger data budget, 4S eSIM also offers fixed‑data plans, such as a 50GB option for 30 days that maintains high‑speed connectivity for the entire validity period. These fixed plans can be more cost‑effective for heavy data users.
4S eSIM does not provide a South Korea eSIM plan that includes a phone number or SMS capability. All South Korea eSIM offerings from 4S eSIM are data‑only. Travelers who need voice or text communications can use VoIP apps such as WhatsApp, Telegram, or iMessage over the data connection; however, some destinations may block or restrict specific apps, so you should verify that the apps you rely on are accessible in South Korea before buying.
4S eSIM provides a range of data plans that include South Korea as one of the supported countries. In its full catalogue the provider lists 57 single‑coverage data plans and 162 multi‑country data plans, both of which cover South Korea as part of the offering. The available plans vary from very low‑priced options of about $1.81 USD up to premium packages close to $195 USD, with data caps ranging from roughly 714 MB to 50 GB over validity periods of 1 to 365 days. Plans are divided into daily data‑cap products (52 in total) and fixed data‑cap products (167), allowing customers to choose between a set amount of data for a set period or a daily allowance that can be used flexibly.
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