Global
Airalo eSIM (KT host)
7 days · 10GB · no voice
₩14,500
VisiteSIMTetheringeSIM instant
Pros
- + Activate before you land
- + Cheap, just data
- + Pay in any currency
Cons
- − Data only, no calls/SMS
- − No Korean number
SIM / eSIM
Money, SIM & FX
SIM & eSIM compare
Telco USIMs include a real Korean number (handy for Korean apps and KakaoTalk verification). Global eSIMs are cheapest if you only need data.
Global
Saily eSIM — Korea 10d 20GB
10 days · 20GB · no voice
₩24,000
VisiteSIMTetheringeSIM instant
Pros
- + Same-day activation
- + Good for 1-week trips
Cons
- − No calls/SMS
- − Roams on local carrier — speeds vary
SKT
SKT Baro Prepaid USIM
7 days · Unlimited data · 100 min voice
₩33,000
VisitTetheringKorean numberAirport pickupCity pickup
Pros
- + Real Korean number issued
- + Useful for app sign-ups
- + Reliable Seoul/Busan coverage
Cons
- − Physical USIM only
- − Activation desk only opens during business hours
LGU+
LG U+ Prepaid Plan
15 days · 50GB (then 5 Mbps) · 50 min voice
₩44,000
VisitTetheringKorean numberAirport pickupCity pickup
Pros
- + Korean number
- + Cheaper for >1 week stays
Cons
- − Slow after data cap
- − Smaller 5G footprint than KT/SKT
KT
KT Roaming OneCard
10 days · Unlimited data · incoming-only voice
₩49,500
VisiteSIMTetheringKorean numberAirport pickupeSIM instant
Pros
- + Coverage parity with locals
- + Tethering allowed
Cons
- − No real Korean number for KakaoTalk auth
MVNO
ChinguPhone (KT MVNO) — Long-Stay 30d
30 days · Unlimited data · 300 min voice
₩64,900
VisiteSIMTetheringKorean numberAirport pickupHome deliveryeSIM instant
Pros
- + Korean number on KT network
- + Cheap for long stay
- + eSIM same day
Cons
- − Customer support mostly English/Korean only
MVNO
EvergreenMobile (SKT MVNO) — 30d
30 days · Unlimited data · unlimited voice
₩69,000
VisitTetheringKorean numberAirport pickupHome delivery
Pros
- + Real Korean number on SKT
- + Unlimited domestic calls
- + Useful for delivery / hospitals
Cons
- − No eSIM yet
Global
Holafly eSIM — Korea Unlimited 15d
15 days · Unlimited data · no voice
₩78,000
VisiteSIMeSIM instant
Pros
- + Truly unlimited
- + Multilingual chat support
Cons
- − No tethering on most plans
- − Premium price