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SIM Cards and eSIMs in South Korea: what actually matters to know

Short answer
Tourist SIM cards and eSIMs are readily available at Incheon Airport, convenience stores, and specialized branches, with on-the-spot purchases often being as convenient as pre-ordering. Verify your device's eSIM compatibility before travel, noting that some iPhone 16 Pro models may encounter specific activation issues.

From real experience

Tourist SIM cards can be purchased in South Korea at Incheon Airport, convenience stores (e.g., GS25), and telecommunication branches.
Physical SIM cards are readily available at the airport. Prices vary; for example, a 25-day SIM with 2GB daily data on Trip.com cost around 1500 RUB, while a 20-day physical SIM at Incheon Airport was 60,500 KRW. Some convenience stores may assist with SIM card activation.
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Incheon Airport procedures for SIM cards and currency exchange: SIM cards are readily available and easy to purchase in the airport after baggage claim, with numerous stalls.
eSIM is an alternative if supported. Currency exchange rates at the airport are generally poor; it's advisable to exchange only a small amount for immediate needs and the rest in Seoul. T-money and Wowpass are also more conveniently acquired or topped up in the city.
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When purchasing eSIMs through Trip.com for South Korea, users have reported activation issues specifically with iPhone 16 Pro models, while other iPhone models (11, 13, 14) functioned correctly.
Common troubleshooting steps include rescanning the QR code, obtaining new codes from support, and enabling VPN. Some users have found success by re-scanning the QR code or ensuring the eSIM plan is added within the Trip.com app. If the eSIM is added to the device but shows an activation error, it may still function once a network is detected upon arrival. Activating roaming data after landing is also recommended. It is suggested that specific device compatibility issues might exist for the iPhone 16 Pro with these eSIMs.
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Tourists should check if their device supports eSim before purchase.
eSims for Korea are electronic files downloaded via email instructions. While some users suggest installing in advance, activation usually occurs upon arrival in Korea. Ensure roaming/data settings are managed according to the specific provider's instructions.
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For transportation from Incheon Airport without a local SIM or digital pass: use cash to buy physical tickets at airport counters for limousine buses (e.g., #6001).
For taxis (like from Seoul Station), if ride-hailing apps require a local mobile number, flag down a taxi manually or ask station info desks for assistance.
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When purchasing a SIM card in Busan, South Korea, with a foreign passport, it is advisable to inquire about specific locations that offer this service.
While SIM cards can be obtained in various places, identifying designated points of sale for foreigners is recommended to ensure a smooth transaction.
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When purchasing a SIM card in South Korea, options are available both for pre-ordering online (e.g., via Wowpass) and buying directly at the airport upon arrival.
According to user experiences, the choice of provider at the airport generally offers similar pricing and quality, making on-the-spot purchases a convenient option.
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SIM cards in South Korea can be purchased at convenience stores like 7-Eleven or CU.
While specific designs vary, convenience stores are a common point of sale.
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