Does my phone work in South Korea? US carrier roaming vs an eSIM, carrier by carrier
In short
Yes, on most US plans: AT&T and Verizon postpaid passes cost $12 a day in South Korea (checked on October 29, 2026). T-Mobile Experience Beyond gives up to 15GB of high-speed data there. Our South Korea plan is data only: 10GB for 30 days is $17.99.
Information verified on October 29, 2026 at the official sources listed below. Carriers change prices and terms; your own plan decides what you pay.
On this page
eSIM for South Korea from $3.99 — see plans
This site is not affiliated with any carrier named on this page; we sell eSIMs. How we compare
You may not need an eSIM. These plans already include data there: T-Mobile Experience Beyond and More, AT&T Elite 2.0 and Google Fi Unlimited Premium. A Korea trip inside that allowance costs nothing extra and keeps your number.
Verizon Unlimited Ultimate prints no country list, so ask Verizon about South Korea.
US Mobile, Xfinity Mobile, Spectrum Mobile and Total Wireless include data there on the plans named below.
Watch the bill traps: with no pass, data in South Korea costs $2.05 per MB on AT&T and Verizon (AT&T rates, Verizon rates). Verizon’s pay-per-use rate for a call there is $1.79 a minute. On Verizon, a call you make or answer, a text you send or background data can start a $12 TravelPass day (Verizon TravelPass FAQs).
We compare public packages; check your own plan.
Does your US phone work in South Korea? Carrier by carrier
South Korea is on every carrier list below that names countries (checked on October 29, 2026). Day passes run from $10 on Visible and Cricket to $12 on AT&T and Verizon postpaid.
| Option | Price | What you need | Weak point |
|---|---|---|---|
| Roaming with your US carrier | May be included on some postpaid or prepaid plans of 5 of 9 US carriers otherwise $10.00 to $100.00 a day or pass from about $2.50 per GB | Data roaming on; with some carriers a pass added before you fly | Paid passes cost more per GB than the eSIM |
| Pocket Wi-Fi router | Not verified | Collect it, keep it charged and return it | One connection for the group, only while you stay together |
| Local SIM bought on arrival | Not verified | A free SIM slot and a shop after landing | An iPhone 14 or later bought in the US works with eSIM only |
| Travel eSIM from this site | from $3.99 by card; from $1.40 per GB | An eSIM phone that is not locked to your carrier | Data only: no calls or texts on your US number |
Roaming prices as published by US carriers, before taxes and fees, checked on October 29, 2026; price per GB is our derivation (price ÷ GB). eSIM prices are in US dollars: your card is charged exactly that amount. This site is not affiliated with these carriers; we sell eSIMs.
Mint and Verizon Prepaid list countries only in a search box; Straight Talk lists none. To answer “does my phone work in South Korea?” for your own plan, search your carrier’s list for the name in the middle column. Carriers spell the country differently; general rules sit on each carrier’s own page.
| Carrier and plan | South Korea listed as | Price or allowance there |
|---|---|---|
| AT&T unlimited plans, postpaid | “South Korea” and “Korea (South Korea)” | Day Pass, $12 a day (checked on October 29, 2026, AT&T); AT&T rules |
| AT&T Elite 2.0 | “Korea (South Korea)” and “South Korea” on the Elite 2.0 list | Included: 20GB a month at high speed (checked on October 29, 2026, AT&T); list checked on October 30, 2026 (AT&T Elite 2.0 destinations) |
| AT&T Prepaid | “Republic of Korea” | International Travel Add-On, $40 for 7 days, 5GB (checked on October 29, 2026, AT&T Prepaid) |
| Verizon, postpaid | “Korea”; “South Korea” on the rates page | TravelPass $12 a day; Monthly Plan $100 (checked on October 29, 2026, Verizon); Verizon rules |
| Verizon Unlimited Ultimate | No list for this plan | 15GB a month at high speed in 210+ countries and destinations, then 1.5 Mbps; ask Verizon about South Korea (checked on October 29, 2026, Verizon) |
| Verizon Prepaid | Search box only | Prepaid TravelPass, 140+ countries and destinations: search for South Korea (checked on October 29, 2026, Verizon Prepaid) |
| T-Mobile, postpaid | “South Korea” | Beyond up to 15GB, More up to 5GB; Essentials: buy an International Pass (checked on October 29, 2026, T-Mobile); T-Mobile rules |
| Google Fi | “South Korea”, also on the 5G list | Unlimited Premium 50 GB at high speed; Flexible $10 per GB, up to $60 for data (Bill Protection, one person) and high speed up to 15 GB, then 256 kbps (checked on October 30, 2026, Fi plans); Standard: not available (checked on October 29, 2026, Google Fi); Google Fi rules |
| US Mobile | “South Korea”, all three networks | Unlimited Premium 20 GB; Starter 1 GB (checked on October 29, 2026, US Mobile) |
| Mint Mobile | Search box only | Minternational Pass, 180+ countries: search for South Korea (checked on October 29, 2026, Mint); Mint Mobile rules |
| Visible | “South Korea” | Global Pass $10 a day, 2GB (checked on October 29, 2026, Visible); Visible rules |
| Cricket | “Republic of Korea” | Passport $10 a day per line (checked on October 29, 2026, Cricket); Cricket rules |
| Boost Mobile | “South Korea” | Global Roaming, $10 a month introductory price for 1 GB (checked on October 29, 2026, Boost Mobile) |
| Xfinity Mobile | “KOREA” | Plus and Select 10 GB per cycle; Global Travel Pass $10 a day (checked on October 29, 2026, Xfinity); Xfinity rules |
| Spectrum Mobile | “South Korea”, Day Pass and Unlimited Plus | Day Pass $10 for 24 hours, 1 GB; Unlimited Plus 10 GB a month; pay-per-use data $0.03/MB (checked on October 29, 2026, Day Pass, rates); Spectrum rules |
| Straight Talk | No list published | 7-day perk, $20 for 5 GB and 300 minutes in 140+ destinations: ask Straight Talk (checked on October 29, 2026, Straight Talk) |
| Total Wireless | “South Korea” | MAX 5G, MAX 5G BYO and ALL ACCESS: 10 GB a month (checked on October 29, 2026, Total Wireless) |
| Tello | “South Korea” | From your Tello balance; we have no South Korea rate: type South Korea in “Traveling to” on Tello’s roaming page (checked on October 29, 2026) |
US Mobile, Boost Mobile, Straight Talk, Total Wireless and Tello have no page of their own here: international roaming plans holds their general rules.
Buying an eSIM instead? It sits next to your US line only on an unlocked phone, so run Is my phone unlocked? and Does my phone support eSIM? first.
Our eSIM for South Korea at a glance
- Purchase QR code by email · after payment
- Installation profile on your phone · up to 365 days
- Activation first network on the trip · the clock starts
eSIM for South Korea: selected plans
The entry plan, our pick and a bigger one. “Our pick” is a mid-size plan chosen by us, not a sales ranking.
You are charged exactly the price shown, in US dollars. The seller is a company registered in the United States, so this is a payment to a US business — how card payment works. It appears on your statement as JET SHARING. You pay on the secure Stripe checkout page, by card, or Apple Pay or Google Pay if Stripe shows them on your device.
What it costs per day
The plan price is what you pay for the trip; a day is that price over the plan’s own days, so a longer plan costs less a day only if you use those days. Pick by your trip length first.
How we compared the options for South Korea
On October 29, 2026, we put three options for South Korea side by side: a carrier pass, data in your plan and a travel eSIM. We weighed each on price for 7 and 14 days, data, and what your phone needs.
That is how this page answers “best eSIM for South Korea”: a dated method, with no seller named or ranked. We hold no South Korea market median. The scale comes from a basket of 11 travel-eSIM sellers, checked from a US IP on October 29, 2026.
There, the middle half of 155 prices for 10GB over 30 days ran from $16.00 to $25.00. Seven-day plans sold as Unlimited form a second basket: where stated, 3 to 5 GB/day at full speed, then reduced to about 1 Mbps. Their middle half of 150 prices ran from $23.27 to $27.50.
Our methodology sets the rules; the table below is our arithmetic for one phone on a land trip.
| One phone in South Korea | 7 days | 14 days |
|---|---|---|
| AT&T Day Pass at $12, postpaid | $84 | $120 to $168, by billing cycle |
| Verizon TravelPass at $12, postpaid | $84 | $168 |
| Verizon Monthly Plan | $100 | $100 |
| T-Mobile Essentials plus an International Pass | $50 (10-day Pass, 15GB) | $75 (30-day Pass, 30GB) |
| Data in Beyond, More, Elite 2.0 or Fi Unlimited Premium | $0 within the allowance | $0 within the allowance |
| Our plan, 10GB for 30 days, data only | $17.99 | $17.99 |
| Our plan, Unlimited — 3 GB/day at full speed, then reduced to 1 Mbps, data only | $24.99 for 7 days | $48.99 for 15 days |
The AT&T range comes from a cap. AT&T’s cruise page says you pay for at most 10 days in one billing cycle (checked on October 29, 2026, AT&T). Fourteen days inside one cycle cost $120; a trip that crosses into the next cycle can cost up to $168 (our arithmetic).
Verizon’s rate row for South Korea prices the Monthly Plan at $100 (checked on October 29, 2026, Verizon). Verizon calls it “Perfect for trips of 9 days or more”: $100/mo per line for 20GB at high speed, then 3G (Verizon Monthly Plan).
For Essentials lines, T-Mobile sells a $50 Pass with 15GB for up to 10 days (checked on October 29, 2026, T-Mobile Passes). Its 30-day Pass is $75 for 30GB.
The row where an eSIM loses is the included-data row: inside that allowance the trip adds $0. On Google Fi, data abroad counts toward your monthly high-speed data (Google Fi).
For data, start with your own use at home. For a week in Seoul on light use, our 1GB for 7 days at $3.99, data only, is about 0.14GB a day (our arithmetic). Our 10GB plan spread over 14 days is about 0.71GB a day; the 7-day plan above allows up to 21GB at full speed (our arithmetic).
A carrier pass keeps calls and texts on your own number. Ours is data only, and the plan doesn’t state a hotspot rule — check the plan page. Roaming or eSIM runs this check against your own dates.
A Korean SIM card, a local eSIM or a travel eSIM?
A Korean SIM card needs a tray. Apple says iPhone 14 models or later “purchased in the United States can only be activated with an eSIM” (checked on October 29, 2026, Apple).
On those phones the choice is between eSIMs. Korean carriers sell their own tourist SIMs and eSIMs; we hold no checked terms or prices for them, so we compare none. A Korea eSIM from a travel seller installs at home before the flight.
We sell no physical SIM cards; Do iPhones have SIM cards? lists which models still take one.
What our South Korea plan covers
Our South Korea plan runs on SK Telecom, listed as 5G, and is a data-only plan (plan details as of October 29, 2026). Its days start at the first connection in South Korea, not at purchase.
We have no coverage comparison between Korean networks, so we claim none for SK Telecom. How much data do I need? helps you size the plan for maps, messaging and video.
Before you go: unlocked phone and your US number
Three checks come first: an unlocked phone, an install on home Wi-Fi, and a plan for your US line. Apple’s rule for another carrier abroad is that “your iPhone cannot be locked to a carrier” (checked on October 29, 2026, Apple).
Only your current carrier can unlock it, Apple says, so ask before the trip (Apple). The plan page shows the install window; how to install an eSIM has the steps.
Leave both lines on and Apple warns: “You might still incur roaming fees from your home eSIM” (Apple). Switch data roaming off on the US line (data roaming); Dual SIM and keep your US number cover texts and 2FA codes. That switch leaves calls and texts alone, and on AT&T or Verizon either can still start a $12 day.
The U.S. Department of State rates South Korea Level 1: “Exercise Normal Precautions” (updated May 27, 2025, travel.state.gov).
Check before you fly
What if the eSIM doesn’t work when you land in South Korea?
Check four settings, in this order, before you write to us.
The first is the line for cellular data. In the phone’s SIM settings, pick the travel line for cellular data; your US line stays on for calls and texts, with its cellular data off.
The second is data roaming, for the eSIM line only. The eSIM is a foreign profile, so the phone treats South Korea as roaming for it.
The third is the APN. The plan does not set it by itself here: add globaldata on Android under the eSIM line’s cellular network settings.
The fourth is a restart. Restart the phone or switch Airplane Mode on and off, and let it find SK Telecom; this can take a few minutes after you leave the plane.
Still no data? Write to us on WhatsApp or at support@esimworld.us with your order number, or go through the no-signal checklist. Do not delete the eSIM to “try again”: a deleted profile usually cannot be installed twice from the same code. If the eSIM doesn't work and it isn't your phone's fault, we refund the payment whether or not it was installed.
What I’d choose (and when NOT to buy the eSIM)
For a week of maps, rides and messaging I’d take 1 GB for 7 days, $3.99. For two weeks or more, with photos and social media, I’d go for 5 GB for 30 days, $10.99. If you video-call and stream every day, take the unlimited plan for 7 days, $24.99, with 3 GB a day at full speed, then reduced to 1 Mbps.
I would not recommend the eSIM in three cases. If your US plan already includes South Korea and its limit is enough for you, roaming costs you nothing extra and keeps your number (compare the carriers). If your phone has no eSIM or is locked to your carrier, it cannot take the plan: check if your phone is unlocked. And if your group travels together all day and shares one connection, a pocket Wi-Fi can cover everyone.
Frequently asked questions
Should I get an eSIM for South Korea?
Only if your plan leaves the trip uncovered. T-Mobile Experience Beyond already includes up to 15GB of high-speed data there. On AT&T or Verizon postpaid, a week of $12 passes costs $84 (our arithmetic, prices checked on October 29, 2026).
Which SIM card is best for tourists in South Korea?
We rank none. Apple says US-bought iPhone 14 models or later can only be activated with an eSIM (checked on October 29, 2026, Apple). A physical Korean SIM card is out on them. That leaves your carrier’s plan or pass, a Korean carrier’s tourist eSIM or a travel eSIM, compared above by trip length and data.
Does a South Korea eSIM include a phone number?
Not ours. Our South Korea plan is data only, with no Korean number and no calls or texts of its own. Your US number stays on your main line.
Sources checked: AT&T: Day Pass · AT&T: pay-per-use rates · AT&T: the 10-day cap per bill · Verizon: international services and pricing · Verizon: TravelPass FAQs · Verizon: Monthly Plan · T-Mobile: plans abroad · T-Mobile: Pass prices · Google Fi: rates abroad · Google Fi: plans and Bill Protection · Spectrum: international rates · Apple: iPhones with eSIM only · Apple: two eSIMs on iPhone · State Department: South Korea advisory.
Sources are linked in the text. Carrier terms change: for the terms of your own plan, check with your carrier.
If no carrier row fits your trip, our South Korea plans list each package with its price.
Unfamiliar term? See the eSIM glossary.
Get an eSIM for South Korea, from $3.99 Pay by card. The seller is a company registered in the United States, so this is a payment to a US business. Install the profile at home on Wi-Fi before you fly. The QR code arrives by email after payment. See plans