Korean Prepaid SIM: Calls Included, or Data Only?

Does a prepaid SIM from Korea let me make phone calls?

Only if you buy the voice version. KT Corporation sells a data-only eSIM that The Data-only eSIM does not support outgoing calls or texts. If calling or texting matters, look for the voice product specifically rather than assuming any "prepaid SIM" covers it.

The same split exists for the physical SIM card, not just the eSIM: 1 voice SIM and up to 4 data SIMs per person.

How is the data-only eSIM different from the voice eSIM?

The Data eSIM is data-only, with no outgoing call or SMS capability; unlimited data with speed control, and the expiration date can be extended.

Where do I actually buy each one?

The Data eSIM can be purchased on site or online; the voice eSIM can only be purchased on site at the KT Roaming Center at the airport. The voice eSIM (data/call/SMS) is available for purchase on site only, at the KT roaming center at the airport.

For the physical SIM, Reserve and pay online in advance, then pick up the SIM at the arrival airport KT roaming center after identity verification.

What does each option cost?

Data-only eSIM: ₩6,500 for a single day, ₩35,000 for a week, ₩71,500 for a month.

The physical data SIM is priced the same way: ₩6,500 for a single day, ₩35,000 for a week, ₩71,500 for a month.

If you're on the voice SIM and run low on call or text credit, The SIM period can be extended by 5, 10, 20 or 30 days; voice/SMS top-up ranges from KRW 5,500 to 55,000.

Who can buy one, and what do I need?

This is a prepaid product exclusively for foreigners visiting Korea. You'll need ID card (passport or certificate of alien registration). If you buy the eSIM, note this payment rule: Payment with credit or debit cards issued in Korea is not accepted.

What if I install the eSIM wrong or need to move it to a new phone?

Install the eSIM by scanning a QR code; installation is available within 90 days after purchase, and must be done within 30 days of the purchase date or the eSIM is automatically terminated with no refund. And once it's in, An eSIM can only be installed one time; deleting it after installation means it cannot be extended, and a new eSIM must be purchased.

What if I don't use up my SIM's validity window?

The SIM must be used within 90 days after purchase, otherwise it expires with no refund. eSIM purchases are non-cancellable and non-refundable once the purchase is completed.

Where can I get help if something goes wrong?

+82-2-2190-0901 (free from any KT mobile phone, press 6 for foreign customer).

Which one should a typical traveler actually pick?

If you just need data for maps, messaging apps and social media, the data-only eSIM is an option, and it can be bought online or on site. If you expect to make an actual phone call — booking a table, calling a taxi company that doesn't have an app, or coordinating a delivery — look at a voice product instead: the voice eSIM is sold on site only, at the KT roaming center at the airport, while the physical SIM can be reserved and paid for online in advance, then picked up at the KT roaming center at your arrival airport after identity verification.