Staying connected in South Korea for 1–6 months? Whether you’re a student, digital nomad, or expat waiting for your ARC, having a reliable Korean SIM card is essential for using KakaoTalk, Naver Maps, Coupang, food delivery apps, and T-money payments. The good news: you don’t need an Alien Registration Card (ARC) to get unlimited data and a real Korean 010 number.
Below are the top 10 Korean SIM card plans for long-term visitors, ranked by unlimited data, voice/SMS inclusion, foreigner accessibility (passport registration), 30+ day validity, and overall value in 2026.
1. KT Unlimited Data + Voice/SMS (Long-Term)
KT consistently ranks as the best nationwide carrier, especially for rural travel and places like Jeju. This long-term prepaid plan includes unlimited 4G/5G data (throttled to 3Mbps after the high-speed quota), unlimited domestic calls and SMS, and a real 010 Korean number, perfect for banking apps and deliveries. Pricing ranges from ₩50,000–70,000 ($38–52) for 30 days, with extensions available up to 90 days. It’s rechargeable, hotspot-friendly, and easy to activate with just your passport. If you want the most stable coverage across Korea, KT is the safest long-stay choice.
2. SK Telecom eSIM Red (Unlimited + 010)
If your phone supports eSIM, SK Telecom’s eSIM Red plan is one of the most convenient options in Korea. You’ll receive the QR activation code by email; no airport pickup required. The plan includes unlimited data (with high-speed quotas), a 010 voice number registered with your passport, and strong 5G speeds in Seoul and Busan. Prices range from ₩30,000–60,000 ($23–45) for 30–60 days. It’s ideal for travelers who want instant activation upon landing. Urban users especially benefit from SKT’s leading 5G network performance and reliable indoor coverage.
3. LG U+ Unlimited Prepaid
LG U+ offers some of the most affordable unlimited prepaid plans among Korea’s major carriers. For ₩40,000–60,000 ($30–45) per 30 days, you’ll get unlimited 4G/5G data, a 010 Korean number, and easy passport registration. It’s particularly strong in cities and popular districts like Haeundae (Busan) and Myeongdong (Seoul). Many foreigners choose LG U+ for its budget-friendly pricing and quick activation process. If you’re staying mainly in urban areas and want lower costs without sacrificing performance, LG U+ provides excellent value.
4. Widemobile Monthly Unlimited (KT MVNO)
Widemobile operates on KT’s network but costs 20–30% less than major carrier plans. For around ₩50,000 ($38) per month, you get unlimited calls, SMS, and data (throttled after 10GB high-speed usage), plus a Korean number for app verification. It’s renewable monthly and works well for long-stay visitors who need KakaoBank and delivery app access. Since it uses KT’s infrastructure, coverage remains strong nationwide. If you want major-network reliability at a lower monthly rate, this MVNO option is a smart compromise.
5. Korea SIM Blue Plus (All Unlimited)
Korea SIM’s Blue Plus plan is a full-featured, worry-free package offering unlimited data, unlimited calls, SMS, and a 010 number. Data typically runs at high speed before dropping to 3Mbps unlimited, which is still enough for HD streaming and navigation. Pricing ranges from ₩58,000–80,000 ($44–60) for 30 days, with longer-term extensions available. Free airport pickup or delivery adds convenience. This is a great choice if you want everything included upfront with minimal hassle, especially for 1–3 month stays.
6. Chingu Mobile Fixed/Unlimited Plans
Chingu Mobile is popular among students and budget-conscious visitors. Plans range from ₩25,000–50,000 ($19–38) per 30 days and typically include 10–30GB high-speed data plus unlimited low-speed usage afterward. You’ll receive a Korean phone number for local app verification, and activation is simple with passport registration. While speeds may not match major carriers at peak times, the savings are significant. For data-heavy users who stream, browse, and navigate daily but want to minimize monthly costs, Chingu Mobile delivers solid value.
7. KT Roaming eSIM Long-Stay (90 Days)
Designed for extended travelers, KT’s 90-day roaming eSIM plan offers unlimited data with optional voice add-ons. At around ₩143,000 ($108) for three months, it’s more expensive upfront but eliminates monthly renewals. Activation is online or at airports, making it convenient for immediate use. Coverage is excellent nationwide, including rural provinces and Jeju Island. If you’re traveling extensively outside major cities or staying for a full semester, this long-duration plan simplifies connectivity without worrying about monthly expiration.
8. LG U+ Sky eSIM
LG U+ Sky eSIM offers unlimited 4G data with daily high-speed allowances (e.g., 3GB/day before 5Mbps throttling). Priced around ₩45,000 ($34) for 30 days, it’s ideal for streaming YouTube or Netflix while navigating city life. Note that some versions provide a 012 number instead of 010, which may limit certain banking verifications. Still, for pure data-focused users who prefer digital activation without physical SIM swaps, this is an affordable and convenient eSIM choice.
9. Trazy MVNO Long-Term SIM (Airport Pickup)
Trazy partners with Korean MVNOs to provide long-term unlimited LTE SIM cards with airport pickup. Plans range from 30 to 180 days starting around ₩60,000 ($45+) depending on duration. You’ll typically receive unlimited data, calls, and SMS with a Korean number. This option is perfect if convenience is your top priority. You can land at Incheon, pick up your SIM, and connect instantly. It’s especially useful for travelers who pre-book everything online before arrival.
10. Woori Mobile MVNO Postpaid Lite
Woori Mobile’s Postpaid Lite plan is suitable for near-permanent stays or those transitioning after getting an ARC. Starting around ₩40,000 ($30) per month, it offers customizable unlimited data and call options. Signup is possible with a passport or ARC, and there’s typically no long-term contract required. Compared to major carriers, pricing is lower while still using reliable Korean networks. If you plan to switch from prepaid to postpaid for lower monthly costs, this flexible MVNO option is worth considering.
How to Choose the Right Korean SIM Plan
For the strongest nationwide coverage (including rural areas), choose KT. For top-tier urban 5G speeds, SK Telecom excels. For city-focused affordability, LG U+ delivers value. Budget travelers should explore MVNOs like Widemobile or Chingu Mobile to save 20–30%.
Most unlimited plans throttle to 3–5Mbps after high-speed usage, which is still sufficient for HD streaming, navigation, and social apps. Always register your SIM within 72 hours and consider switching to a cheaper postpaid plan after receiving your ARC.
Conclusion
For long-term visitors in Korea, a prepaid unlimited SIM with a 010 number is essential for daily life, from food delivery to online banking. With flexible 30–90 day options and easy passport registration, staying connected in Korea has never been easier. Planning to stay in Seoul or Busan for several months? Choose a plan that balances coverage, speed, and renewal flexibility, and you’ll enjoy seamless connectivity throughout your stay.