Does a Korean Prepaid SIM Support Phone Calls?
CONNECT ON Inc. · How we verify · sources read SEP 9, 2026
Highlights
The short answer
A Korean prepaid SIM works for phone calls only if you get the voice version — KT sells a separate data-only SIM that does not support outgoing or incoming calls at all, so a traveller who wants to make and receive calls needs to ask specifically for the voice product rather than assuming any prepaid SIM includes it. This is current as of the operator's own product pages, which treat data-only and voice as genuinely different purchases, not tiers of the same one.
SIM, eSIM & Connectivity · Data · Numbers · Wi-FiPhotograph: K Travel Way
Korean prepaid SIMs for foreign visitors are not one product with optional extras — they're sold as two separate lines, and only one of them handles phone calls.
Which version actually makes and receives calls?
The voice eSIM (with call/SMS) is available on site only at the KT roaming center in the airport
What does the data-only version support instead?
The Data-only eSIM does not support outgoing calls or texts It's registered as a separate purchase rather than an add-on to the voice product.
Can I have both?
1 voice SIM and up to 4 data SIMs per person — so a traveller who wants a working phone number for calls alongside extra data-only lines for other devices can hold both types at once.
Do I need anything extra to use the voice line?
Reserve and pay online in advance, then pick up the SIM at the KT roaming center at the arrival airport after identity verification Voice service specifically activates only after that identity check is completed at the airport.
Questions people ask
If I buy a data-only SIM, can I still receive calls on it?
No — the data-only line does not support calls or texts in either direction. Calling requires the separate voice product.
Can I get one voice SIM and extra data-only SIMs for other devices?
Yes — the purchase limit allows one voice SIM plus up to four data-only SIMs per person, so both types can be held at the same time.
