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How much data do I need for a trip to South Korea?
Quick answers for a trip to South Korea, using the same activity rates as our data calculator — then the local gotchas that change real-world use, and the cheapest plans we listed in our South Korea guide.
Quick answer: plan size by trip length
Pick the column that matches how you use your phone. Light is maps and messaging; Typical adds social and a little video; Heavy adds streaming and some hotspot. Figures are the plan size we’d buy after the 15% buffer — not a guarantee of your phone’s meter.
| Trip length | Light use | Typical use | Heavy use |
|---|---|---|---|
| 3 days | 1 GB549 MB est. | 3 GB2.55 GB est. | 10 GB8.62 GB est. |
| 7 days | 3 GB1.25 GB est. | 10 GB5.95 GB est. | Unlimited20.12 GB est. |
| 10 days | 3 GB1.79 GB est. | 10 GB8.50 GB est. | Unlimited28.74 GB est. |
| 14 days | 3 GB2.50 GB est. | 20 GB11.89 GB est. | Unlimited40.23 GB est. |
| 30 days | 10 GB5.36 GB est. | Unlimited25.49 GB est. | Unlimited86.22 GB est. |
Estimates use the same formula as our eSIM data calculator: activity rates × hours/day × days, plus a 15% buffer, rounded up to 1 / 3 / 5 / 10 / 20 GB or unlimited. No hotel Wi‑Fi assumed. Checked methodology 4 November 2026.
Open calculator pre‑filled for South Korea Full South Korea eSIM guide Compare with roaming cost
South Korea plan snapshot
Checked 4 November 2026- Cheapest fixed plan
- $31 GB: Ubigi (7 days) and Yesim (30 days)
- 7 days unlimited
- $25Nomad and Ubigi
- 10 GB / 30 days
- $14Ubigi (Nomad: $18 on sale)
From our South Korea guide, official pages checked 4 November 2026. Always confirm at checkout.
What makes data use in South Korea different
- Download Naver Map or KakaoMap before you land. Google Maps is limited for transit and walking directions in Korea. Offline packs on Naver/Kakao cut live map traffic once you’ve cached routes.
- Transit cards don’t use mobile data, but apps do. T‑money, WOWPASS and the Climate Card are physical or app wallets — the apps themselves are light, but real‑time subway overlays still need a connection.
- Three national networks (SK Telecom, KT, LG U+) — check which one your plan names if you’re leaving Seoul for mountains or islands.
- K‑ETA rules change. Some passport holders are temporarily exempt; others need authorisation. That isn’t a data issue, but it’s the first thing to sort before you care about gigabytes.
Networks named in our guide: SK Telecom, KT and LG U+ (Nomad lists all three; Ubigi names LG U+ and SK Telecom; Airalo lists SK).
Next steps
Tune the estimate
Adjust hours, Wi‑Fi and devices on the data calculator — your URL becomes a share link.
Pick a plan in the South Korea guide
Fixed vs unlimited, fair use, hotspot rules and affiliate links to Airalo, Saily, Yesim and others.
Weigh roaming
If your home carrier sells a daily pass, run the numbers on our eSIM vs roaming comparator.
Frequently asked questions
How much eSIM data for a week in Seoul?
Typical city use (maps, messaging, social, some video) lands around 6 GB after the buffer — buy a 10 GB plan. Heavy social scrolling on the metro is the main variable — Korea’s feeds are video‑heavy.
Does Google Maps work in South Korea?
It works for some layers, but locals and most visitors use Naver Map or KakaoMap for transit and walking. Download them on Wi‑Fi before you fly.
Is 10 GB enough for two weeks in Korea?
Usually yes for typical use. Stream HD or hotspot a laptop daily and you’ll want unlimited or a top‑up — see prices in our South Korea guide.
How does Signal Atlas calculate these numbers?
We use published planning rates (for example Netflix’s SD ≈ 0.7 GB/hr and Spotify Normal ≈ 72 MB/hr), multiply by hours per day and trip length, add a 15% buffer, and round up to a common plan size. Full methodology is on the calculator page.
Can I share this estimate?
Open the pre‑filled calculator for South Korea — the URL stores your sliders so you can send it to a travel buddy.
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Last checked 4 November 2026
All prices and plan facts on this page were read from these official pages on 4 November 2026. We have not purchased or tested these plans ourselves; we summarize what the providers publish, in our own words. Read our method.
- Signal Atlas — Best eSIM for South KoreaChecked 4 November 2026
- Signal Atlas — eSIM data usage calculator (methodology & rates)Checked 4 November 2026
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- Netflix Help — How to control how much data Netflix usesChecked 4 November 2026
- Spotify Support — Audio quality / data usageChecked 4 November 2026