South Korea · roaming cost calculator
South Korea Roaming Price Audit: $12 a Day Against a $28.49 Plan
HelloRoam is the top pick for South Korea: its 7-day unlimited plan costs $21.50, at full speed for the first 2 GB a day, against $84 for a week on AT&T's $12-a-day pass, a $62 gap, and Nomad is next cheapest at $25. HelloRoam's support replies in your own language over live chat, WhatsApp and email. Airalo covers 200+ destinations to HelloRoam's 185. HelloRoam's price is from its catalogue of 29 Oct 2026, rivals' from the 30 Oct 2026 price check; AT&T's rate was checked June 2026.
a 20GB travel eSIM at $28.49 and a $12 day pass are both dollar prices. HelloRoam settles in 31 currencies, so a non-dollar card can skip the 2 to 4 percent conversion on the eSIM side.
eSIM plan rates provider-by-provider, South Korea
Heavy data users in South Korea can pick HelloRoam's unlimited plan: $21.50 for 7 days of unlimited data, at full speed for the first 2 GB each day.
Get eSIMHolafly's South Korea plans include a 6-month refund policy for unused purchases. Coverage runs on a local 5G network at a median $3.93/day, one of the longest standard refund windows in the category.
Get eSIMNomad sells South Korea data at $2.30/GB. Budget travelers who don't need live support get solid 5G coverage at a low per-GB rate.
Get eSIMAiralo runs support through in-app chat. For South Korea trips where setup goes smoothly — device compatible, QR code scanned before departure — most travelers never open a ticket.
Get eSIMSaily pairs a local 5G network in South Korea with built-in VPN at $2.60/GB. A 5GB plan covers a week of browsing, messaging, and maps with encrypted traffic on every connection.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Airalo vs HelloRoam · Holafly vs Saily · Holafly vs Nomad · Holafly vs HelloRoam · Saily vs Nomad · Saily vs HelloRoam · Nomad vs HelloRoam
The full picture
Carrier-checked roaming rates, South Korea
Every major carrier's published South Korea rate, side by side, with the eSIM winner highlighted.
| Carrier | Plan type | Daily | 7-day | Speed | Data limit |
|---|---|---|---|---|---|
| AT&T | International Day Pass | $12.00source | $84.00 | LTE | Plan data |
| Verizon | TravelPass | $12.00source | $84.00 | LTE | Plan data |
| T-Mobile | International Pass | $10.00*source | $50.00 | LTE | 2GB per 1 Day pass |
| eSIM · HelloRoam | 20GB data plan | — | $28.49 | 5G | 20GB |
*T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. The 1 Day International Pass costs $10; the 7-day figure is the cheapest pass mix, 10-day pass.
Compare all carrier roaming plans to see how AT&T, Verizon, T-Mobile, Vodafone, and EE stack up against eSIM providers.
Pay-per-use cost audit
AT&T pay-per-use costs in South Korea: a scenario breakdown
AT&T's international pay-per-use rate is $2.05/MB in South Korea. Mixed phone use — maps, messaging, and social media — runs about 60 MB/hour. One hour of that: $123. Four hours of normal use: $492. Eight hours, a full day out: $984. A 30-minute Zoom meeting alone adds $922. A 5-minute video call with family costs $154. These are AT&T's published pay-per-use figures. Source: AT&T international rate card, June 2026.
Personalize your savings
Your South Korea saving against $12 a day
Adjust the trip length, the carrier and the daily data below and the calculator reprices both sides. The starting point is the 7-day average stay recorded for South Korea: $84 on an AT&T day pass at $12 a day, against $28.49 for a 20GB travel eSIM. Both prices buy access to the same local operators.
Network coverage
South Korea network performance: speeds and coverage
Both AT&T and Verizon use LG U+ for South Korea roaming. SKTelecom also operates in South Korea and falls into the same roaming agreement. Travel eSIM providers access LG U+ and SKTelecom at $1.11/GB. You get the same towers, the same speed, and the same coverage. The difference is your bill. The plan feed lists 5G on a local network in South Korea. AT&T's roaming agreement covers that 5G service. Travel eSIM providers' LG U+ agreements also cover 5G. Price: AT&T $12/day versus eSIM $1.11/GB for identical 5G access. South Korea has widespread 5G coverage. 100% population coverage; world leader in 5G deployment since 2019 launch SK Telecom has the widest 5G footprint in Korea; providers routing through KT also reach 5G nationwide.
Network attachment record
The networks behind both prices in South Korea
HelloRoam publishes 2 local operators for South Korea: LG Uplus and SKTelecom.
An eSIM attaches to one of them on arrival.
HelloRoam names no default, so the file cannot say which one your handset picks.
HelloRoam records a 5G label against all 2 operators.
Carrier roaming runs on local operators too. That is what a roaming agreement buys.
Same masts, two invoices. The gap on this page is a billing gap.
5G and 4G here are capability labels. Neither one is a speed reading.
HelloRoam's operator record names LG Uplus and SKTelecom for South Korea. The same file holds 185 destinations, 154 distinct operators and 98 destinations with at least one 5G entry. Nothing in it says which operator a handset picks, and neither does this page.
| Operator | Network generation on file |
|---|---|
| LG Uplus | 5G |
| SKTelecom | 5G |
Source: HelloRoam package feed, read 17 August 2026. The feed publishes an operator list for every destination it sells. No speed test sits behind this table, and we ran none. The full operator map covers 185 destinations.
Pricing breakdown
Price breakdown: roaming vs eSIM in South Korea
Verizon TravelPass for South Korea: $12/day x 14 days = $168. AT&T International Day Pass: 10 daily fees × $12 (AT&T's cap per bill cycle) = $120. A 10GB eSIM on a local network covers the full 14 days for $11.10. That is $108.90 less than AT&T and $156.90 less than Verizon.
The eSIM daily rate works out to $0.79 when spread across 14 days. AT&T charges $12/day, which is 15.2x that figure. T-Mobile's high-speed pass is $10/day. All three connect to the same local towers in South Korea. AT&T International Day Pass costs $12/day in Korea vs $4/day for a local unlimited eSIM — travelers save 60% with eSIM.
Per-GB rates for South Korea eSIM plans: 1GB at $3.99 ($3.99/GB), 3GB at $7.99 ($2.66/GB), 5GB at $9.99 ($2/GB), 10GB at $17.99 ($1.80/GB), 20GB at $28.49 ($1.42/GB). Larger plans cost less per gigabyte, so buying up one tier saves money if you are close to the limit. Unlimited daily plans remove the per-GB calculation entirely at $2.79/day for 14 days. Korea unlimited eSIM plans start at just $3.99/day from SKT — among the best value for unlimited data globally. Travelers in South Korea average 2.0GB of mobile data per day, so a 14-day trip needs roughly 28GB.
South Korea publishes five unlimited durations: 1 day at $3.49, 3 days at $9.95, 7 days at $21.50, 14 days at $39.09, 30 days at $71.20. Buying the 30-day block brings the daily price to $2.37. Unlimited here means 2GB a day at full speed before a fair-use policy applies. Catalogue prices read 29 Oct 2026.
Trip cost breakdown
Carrier roaming vs eSIM cost in South Korea by trip length
AT&T bills $12/day for roaming in South Korea — that is $0.50/hour around the clock, whether your phone is in your pocket or active. A 2GB eSIM on a local network costs $7.99 for 3 days — $0.11/hour at continuous use. Difference for a 3-day trip: $28.01.
Over 14 days, AT&T's per-hour rate stays at $0.36. A 20GB eSIM on a local network for 15GB averages $0.08/hour over the same 14 days. AT&T total: $120. eSIM total: $28.49. Difference: $91.51.
A 30-day stay at $0.17/hour on AT&T reaches $120. A 50GB eSIM on a local network covering 50GB for video calls and streaming costs $61.79 — $0.09/hour. Total difference over 30 days: $58.21 (49%). Rates checked June 2026.
Airport options
South Korea airport data: what it costs and what to skip
The SIM counter at Incheon (ICN) opens after you clear immigration. SK Telecom and KT Olleh and LG U+ charge $12-30 for unlimited data / 3-30 days and the process takes 5-10 min; convenience stores also sell SIMs including registration. Passport or ID is required for SIM registration. A 1GB eSIM costs $3.99 and activates the moment your plane touches down — you skip the counter and have maps working before you reach the taxi rank. If price matters most, city shops sell prepaid cards for $12-25 for unlimited data / 5-10 days, but that means another stop after arrival.
Local alternative
Local SIM vs eSIM in South Korea
Local prepaid SIM plans in South Korea from SK Telecom and KT Olleh and LG U+ start at $12-25 for unlimited data / 5-10 days and usually offer higher data volumes than travel eSIM plans. Coverage is the same — both options run on the local network infrastructure. The eSIM at $3.99 trades per-GB cost for instant activation and no passport requirement.
Data planning
Data costs for 7 days in South Korea: carrier vs eSIM
South Korea has solid hotel and cafe WiFi, which trims cellular data use. With WiFi for large downloads, your mobile data averages closer to 2.0GB per day. A 20GB plan at $28.49 covers 14GB for 7 days.
For a 7-day trip, the 20GB plan at $28.49 covers 14GB at $1.42/GB. AT&T's roaming pass for the same 7 days reaches $84. For heavy data users, a 1-day unlimited plan costs $3.49, still under AT&T's $12/day pass.
Connectivity
Public WiFi coverage in South Korea
WiFi and an eSIM are not competing options in South Korea — they work together. Free WiFi on Seoul Metro, KTX trains, most cafes; South Korea leads globally in hotel WiFi quality Use hotel and cafe WiFi for large downloads, streaming, and photo uploads. Use your eSIM on a local network for navigation, payments, and anything that needs an instant connection. A $1.11/GB plan covers the gaps without paying AT&T's $12/day rate.
Plan your data
South Korea connectivity: planning your GB budget
Carrier roaming in South Korea runs $10-$12/day with T-Mobile, AT&T, or Verizon. A 7-day trip costs $50-$84 in roaming fees. A 20GB eSIM plan replaces that entire bill at $28.49.
South Korea has two mobile operators: LG U+ and SKTelecom. When AT&T or Verizon customers roam here, their calls and data pass through these exact networks. A travel eSIM reaches LG U+ or SKTelecom directly at $1.11/GB — the service is identical; the roaming markup is not.
Airport SIM counters at Incheon (ICN) charge $12-30 for unlimited data / 3-30 days after a 5-10 min; convenience stores also sell SIMs wait — still more than a 20GB eSIM at $28.49. Local prepaid SIMs in South Korea run $12-25 for unlimited data / 5-10 days, requiring an in-person stop and sometimes a passport copy. An eSIM at $28.49 skips that entirely. Prices stable year-round; unlimited data plans are standard in Korea
Quick reference
South Korea Travel Essentials
112/119
112, 119 are the emergency numbers in South Korea. Different numbers may route to different services — save all of them before your trip. Emergency calls work from any mobile device, including travel eSIMs.
Type C/F
South Korea uses Type C outlets (European two round-prong). US plugs require a Type C adapter. Check that your phone and laptop chargers show 100-240V input — most modern chargers are compatible.
KST (UTC+9)
KRW (₩)
Tap-to-pay (Apple Pay, Google Pay) is accepted at most stores and restaurants in South Korea. Visa and Mastercard work at virtually all merchants. Carry a small amount of local KRW for markets, taxis, and small vendors that do not have card readers.
Quick tip
Traveling to South Korea during Apr-May and Sep-Oct? Book your eSIM before departure — airport SIM counters have longer wait times in peak months.
Good to know
South Korea's 5G network is widespread. 100% population coverage; world leader in 5G deployment since 2019 launch If your device supports 5G, a travel eSIM accesses these speeds at the same price as 4G LTE plans.
Step by step
How to add a South Korea eSIM to your phone
- Open Settings > Cellular on your iPhone (or Connections > SIM on Samsung) to confirm eSIM support — SK Telecom runs 5G across South Korea
- On iPhone or Pixel: open the HelloRoam app, search South Korea, and purchase the 1GB plan at $3.99 — your QR code appears in the app the moment payment clears. Compare all providers before deciding.
- On Samsung Galaxy: go to Settings > Connections > SIM manager > Add eSIM and scan the QR code — do this before your flight to Incheon (ICN) so it activates the moment you land
- On Google Pixel: go to Settings > Network > SIMs, select your home carrier, and disable the Roaming toggle. See the complete data roaming guide for all device types.
- First landing in South Korea: if your eSIM does not connect on its own, toggle Airplane Mode on then off — this forces your phone to scan for SK Telecom's 5G signal
- Returning traveler: if you communicate via iMessage or WhatsApp, WiFi Calling is optional — those apps run over the HelloRoam eSIM data at no added cost and cover most communication needs in South Korea
Data tips
How to use less data in South Korea
Local transit apps in South Korea use about 5-15 MB per route lookup including map tiles. Download the relevant transit app before departure and log in over WiFi. Google Maps works for transit directions in most South Korea cities with under 10 MB per query when offline maps are pre-loaded.
Regional context
Asia roaming rates and how South Korea fits in
A few things to know before turning off carrier roaming in South Korea:
South Korea SIM registration: Passport required for local SIM; available at airport counters with instant activation. A travel eSIM purchased abroad bypasses local SIM registration requirements at the point of sale.
KakaoTalk is the dominant messaging app — used by 93% of the population; essential for local communication
T-money transit card works on phones via NFC alongside active eSIM
South Korea has the highest average mobile data consumption per user globally at ~15GB/month
Many Korean websites and services require a Korean phone number for verification (PASS app)
Free public WiFi available in all Seoul subway stations and most public buses
Free WiFi on Seoul Metro, KTX trains, most cafes; South Korea leads globally in hotel WiFi quality Roaming passes charge $12/day to fill WiFi gaps. An eSIM covers the same connectivity at $1.11/GB.
Korean carriers offer unlimited data as standard — no data cap anxiety that plagues fixed-data eSIM plans in most countries.
Cherry blossom season (April) and autumn foliage (October) are peak; summer monsoon June-August
Nearby
Related destinations
6 destinations near South Korea are priced on the same rate card. AT&T bills $12 a day in every one of them, and the figure beside each flag is that destination's own per-gigabyte floor. The cheapest of the group is Bangladesh at $1.25 a gigabyte.
Forgot your eSIM?
What to do if you arrive in South Korea without data
You landed in South Korea without an eSIM. Here is what that costs and what you can still do.
All 5 providers — HelloRoam, Holafly, Nomad, Airalo, and Saily — allow post-arrival purchase and installation over WiFi. You do not need a local SIM to buy an eSIM. Incheon (ICN) has free WiFi in the arrivals hall. Connect there, open a provider's app, and install a 1GB plan ($3.99 in this site's catalog) before you leave the terminal. If airport WiFi is unavailable, hotel lobby WiFi works as a fallback — most front desks in South Korea give you the password at check-in. Last resort: turn on carrier data long enough to download the eSIM provider app (~5 MB, roughly $10 on AT&T pay-per-use), then switch to the installed eSIM immediately. That charge lands once, unlike AT&T's $12/day pass, which bills again every day of the trip.
Savings math
How much you save in South Korea
Solo traveler
The $55.51 a solo traveler saves by choosing an eSIM over AT&T roaming in South Korea covers 3 restaurant meals, 2 museum tickets, or 1 taxi rides in most destinations. That money came from the same local network connection AT&T charges $84 for.
Family trip
Families with children face double roaming costs — two parents on full plans plus two kids whose phones sync games and app updates in the background. In South Korea, AT&T bills $12 a day for the first line and $6 for each extra line used the same day, at most 10 daily fees per line each bill cycle. Four lines for 7 days: $210. A single 20GB eSIM at $28.49 shared via hotspot covers all four devices. Total family cost drops from $210 to $28.49.
AT&T roaming rate analysis
AT&T International Day Pass does not add extra data for South Korea roaming. It uses your existing domestic plan data allowance. A customer with a 5 GB domestic plan who has used 3 GB at home has only 2 GB left for their South Korea trip. After 2 GB, AT&T throttles to slower speeds while the $12/day charge continues. A 20GB eSIM at $28.49 provides a separate data bucket that does not affect or draw from your home plan. This is the key structural advantage over Day Pass: independent data.
All-carrier summary
AT&T: AT&T International Day Pass costs 195% more than an eSIM for South Korea.
Verizon: Verizon TravelPass costs 195% more than an eSIM for South Korea.
T-Mobile: T-Mobile's International Passes cost 76% more than an eSIM for South Korea.
An eSIM saves money in South Korea for every trip longer than one day. The single exception: a same-day layover where you need your US number active for voice calls. AT&T's $12 for that one day may be worth the convenience. For any trip of 2+ days, the 20GB eSIM at $28.49 saves $55.51 over 7 days on a local 5G network.
Quick answers
Common questions about South Korea data costs
Is eSIM cheaper than roaming in South Korea?
A travel eSIM saves $55.51 on a 7-day South Korea trip compared to AT&T roaming. The eSIM connects to a local 5G network for $28.49. AT&T charges $12 per 24 hours of use for the same towers. The savings are 66% with no difference in coverage or signal quality. Rates checked June 2026.
How much does roaming cost in South Korea?
South Korea roaming costs per device: AT&T $84, Verizon $84 (7 days). A family of four pays $336 on AT&T. Four eSIMs on a local network: $113.96. Rates checked June 2026.
Does T-Mobile work in South Korea?
Yes, within the plan's allowance. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. At 256Kbps Google Maps and ride-hailing apps stall. T-Mobile's 1 Day International Pass costs $10 for 2GB, and a week of passes $50 (10-day pass). A travel eSIM on a local 5G network costs $28.49 for 20GB over 7 days. Rates checked June 2026.
AT&T fine print for South Korea
$12 covers 24 hours from the first time your phone uses a foreign network, and a single background push notification at 2 AM can start it. AT&T bills at most 10 daily fees per line each bill cycle (terms read 31 Oct 2026).
iCloud Photos, email push, app updates all trigger the daily charge. A phone left in a bag with data roaming on starts a new $12 fee each time a sync lands after the last 24 hours ran out.
South Korea FAQ
South Korea eSIM & roaming questions
South Korea carrier roaming costs $12 a day on AT&T and on Verizon
Three US carriers cover South Korea: AT&T at $12/day, Verizon at $12/day, and T-Mobile at $10 for a 1 Day pass, with 5GB or 15GB of high-speed data included on its Experience plans. All three rent capacity from SK Telecom. So do the five travel eSIM providers priced here: HelloRoam, Holafly, Nomad, Airalo, and Saily, from $3.99 for 1GB. One thing the day pass does that a data-only eSIM does not: it keeps your own number live for calls and texts without WiFi. If you need that and use almost no data, $12/day is a fair trade. If you use data at all, it is not. Rates checked June 2026.
T-Mobile's included data in South Korea runs at high speed until the allowance ends
Until the allowance ends. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. On the same local towers in South Korea, a travel eSIM runs full 5G from $1.11/GB. The five providers differ on what happens next: HelloRoam and Holafly refund unactivated plans for 180 days, Airalo for 14. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
South Korea roaming bills by the day, not by the gigabyte
AT&T's per-day fee in South Korea covers 24 hours from first use. A background email sync an hour after that window closes starts a second fee, so 25 hours on the network costs $24. AT&T stops at 10 fees per line each bill cycle. Verizon runs the same 24-hour sessions with no stated cap. A travel eSIM at 1GB for $3.99 uses data-volume billing — the cost increases only when you actually consume data.
An hour of streaming in South Korea uses more data than a day of maps
An hour of Netflix in HD uses about 3 GB by Netflix's own figures, so it costs about $3.33 at $1.11/GB on SK Telecom. Standard definition uses about 700 MB, or $0.78. YouTube at 720p uses about 900 MB an hour. Streaming is the one habit that breaks a fixed-data plan. HelloRoam's 7-day unlimited plan has the lowest median of the five at $21.50 across 35 countries, against $27.50 on Holafly, but HelloRoam's plan runs at full speed for 2 GB a day in 33 of those 35 countries, under one HD hour. Holafly states no daily cap, which is where it earns its price for a heavy streamer. AT&T covers streaming under the $12/day pass but charges it whether you watch or not. Download over hotel WiFi and the question disappears. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
Mid-trip spend in South Korea is readable in the provider app
On a travel eSIM you already know it, because you paid once and the number cannot move. You bought $1.11/GB upfront on SK Telecom, or a 7-day median of $21.50 on HelloRoam's unlimited plan. What you track is data left, not money spent, and every provider app shows that balance. Carrier roaming inverts it. AT&T's $12/day accrues against a bill you will not see for weeks, and MyAT&T does not break out day-pass charges by country while you are still on the trip. That is the honest difference between the two billing models: one is a purchase, the other is a meter you cannot read. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
The three US carriers price South Korea roaming on different terms
None of the three US carriers offer a genuinely good deal in South Korea. AT&T: $12/day. Verizon: $12/day. T-Mobile: 5GB or 15GB of high-speed data included on its Experience plans, then up to 256Kbps, or $10 for a 1 Day pass. A travel eSIM on SK Telecom starts at $1.11/GB — a 7-day trip at average usage costs $11.66 versus $84 for AT&T. No carrier matches the eSIM on per-GB cost.
A week of South Korea data costs $84 on AT&T
AT&T International Day Pass: $12/day, $84 for 7 days. Verizon TravelPass: $12/day, $84. T-Mobile International Pass: $10/day, $50. The base T-Mobile tier costs nothing but runs too slow to be usable. Against T-Mobile's $10/day pass, a travel eSIM on SK Telecom runs roughly $11.66 for 7 days at 1.5 GB/day average usage. The eSIM is 80-90% cheaper than any paid carrier option.
Local South Korea apps run on a travel eSIM without a local SIM
Most local apps in South Korea — ride-hailing, food delivery, transit — do not require a local SIM number to function. They require only a data connection, which a travel eSIM provides at $1.11/GB on a local 5G network. Some banking and two-factor authentication apps require a local phone number for SMS verification. For those cases, keep your home SIM active alongside the eSIM — your home number handles SMS while the eSIM handles data.
One eSIM can cover a multi-country Asia route including South Korea
Multi-country Asia eSIM plans exist and cover many combinations — Japan, South Korea, Thailand, Singapore, and others in a single data bucket. AT&T and Verizon charge $12/day in each country separately, so a 3-country trip at 3 days each costs $108. A regional Asia eSIM for the same 9 days runs $15-$40 total. Check plan coverage maps — South Korea may be included in a regional plan, or you may need a South Korea-specific plan plus a regional one.
A week of South Korea carrier roaming costs $84
AT&T: $84/week (International Day Pass at $12/day). Verizon: $84/week (TravelPass). T-Mobile: 5GB or 15GB of high-speed data included on its Experience plans, then up to 256Kbps, or $50 for a week of passes (10-day pass). The cheapest eSIM for South Korea starts at $1.11/GB on a local 5G network — better per-GB value than all three carriers.
Fact check
eSIM and roaming: facts vs. assumptions for South Korea
International calling cards cover data
Traditional international calling cards provide prepaid voice minutes for international calls — they do not include mobile data. Using a calling card in South Korea leaves you without data for maps, messaging apps, or anything internet-based. A 1GB eSIM on a local network at $3.99 provides data-only coverage. Pair it with a calling card if you also need voice minutes to landlines. Rates checked June 2026.
Airport SIMs are the cheapest option
Airport SIM counters at Incheon (ICN) in South Korea charge $12-30 for unlimited data / 3-30 days, plus a 5-10 min; convenience stores also sell SIMs queue after clearing immigration. A 1GB eSIM costs $3.99 and installs before your flight — no counter, no queue, no passport copy. Rates checked June 2026.
WiFi is always available abroad, so you do not need a data plan
Hotel WiFi in South Korea covers your room. It does not cover the taxi line, the train platform, or the restaurant street. Navigation, ride-hailing, and payment QR codes all need a live cellular connection outside the hotel. A 1GB eSIM on a local network covers those gaps for $3.99. AT&T charges $12/day for the same access.
Our recommendation
South Korea trip data conclusion
On this site's rubric, HelloRoam is the pick for South Korea. HelloRoam covers South Korea on a local network and scores 9.9/10 on our rubric, the highest of the 5 providers we price. A 1GB plan costs $3.99. Unactivated plans are refundable for 180 days, and its support replies in your own language. Holafly is the alternative for heavy data users: it states no daily cap, at a 7-day unlimited median of $27.50 on 30 Oct 2026.
Learn more
Travel guides, South Korea
4 guides carry the parts of a South Korea trip this page does not price: installing the profile before departure, switching data roaming off on the home SIM, and what happens to the allowance once a fair-use policy applies. Each one reads the same rate card as this page, where AT&T bills $12 a day.
7 days in South Korea: $56 difference between carrier roaming and eSIM
South Korea eSIM plans start at $28.49 for 20GB. That is $56 less than a week of AT&T roaming.
Get a South Korea eSIM