South Korea SKT Unlimited Red eSIM and Gold pickup SIM products include unlimited 4G LTE data with no fair use policy, no daily speed cap, and no throttling. Calls and SMS are available only after passport authentication and recharge.
Phone number
For SKT eSIM orders, the assigned phone number is shown with the QR code details sent by email. For SKT pickup SIM orders, the phone number can be confirmed after you collect the physical SIM.
You can see the number before calls and texts are ready, but the line must pass passport authentication before it can make or receive calls and SMS.
Passport authentication
Authentication is possible with a short-term foreign passport. When prompted, manually enter your passport details on the activation portal. You do not need to upload a passport photo.
One passport can be used for one activation per carrier under Korean telecom rules. If online authentication is not available for your situation, SK Telecom may require in-person verification at an SK Telecom Roaming Desk with your physical passport.
Calls, texts, and recharge
SKT Unlimited includes one free call of up to 5 minutes as a one-time activation benefit. It is not unlimited 5-minute calls.
After activation, domestic and international calls/SMS require recharge credit. Recharge is available online through KRSIM or offline at an SK Telecom Roaming Desk. BambooSIM does not provide an API-based recharge flow for SKT voice/SMS credit.
Balance alerts
SKT sends automated SMS notifications when you recharge, when your call/SMS balance drops below 1,000 KRW, and when the balance runs out. You can also check the real-time balance at skroaming.com.
T-Money promotion
The 2026 T-Money transit card promotion runs from 1 January 2026 to 31 December 2026. Eligible customers who purchase SKT eSIM Red or SKT SIM Gold for 3 days or longer can receive one free T-Money card by presenting the required voucher.
Pickup is available at SK Telecom Roaming Desks in major airports, including Incheon, Gimpo, Gimhae/Busan, and Jeju. Promotion details and stock may change. See the official KRSIM promotion notice for the latest details.