The short answer
You have AT&T or Verizon, and the question is whether to let the phone roam in Seoul or buy a travel eSIM first. I compared what each carrier charges in South Korea, read on 31 October 2026, with the travel eSIMs I priced on 25 October 2026 and with Ringo Light. For anything longer than a day or two I would buy Ringo Light and keep my own SIM in the phone for calls and texts.
Unlimited data at full speed for 2 weeks at $23.99 or 30 days at $35.99, nothing renews. Airalo asks $49 for 15 days and $69 for the month, and a carrier pass used every day costs far more than either.
For light use on maps and messages: 10 GB for 30 days at $14 and 25 GB at $25, on LG U+ and SK Telecom with 5G.
Unlimited for 3 days at $11 and 20 GB for 30 days at $28, on SK Telecom, KT and LG U+. The nearest rival to Ringo Light for a long weekend.
Days, not gigabytes, with no daily cap stated for your own phone, on SK Telecom and LG U+. $27.50 for a week.
Prices read on 25 October 2026: Airalo, Holafly, Nomad, Ubigi, AT&T, Ringo Light, Verizon on their own sites or listings, Ringo Light from its catalogue. All in US dollars unless stated. Treat every number as a snapshot.
See the full price index for every country.
Travelling further? Compare the best eSIM for Asia and the eSIM for Asia-Pacific.
The prices, charted
US dollars, 25 October 2026. The rivals sell 15 days, Ringo Light 2 weeks. Ubigi's 15 days is 30 GB at full speed, then 2 Mbps. Nomad sells no 15-day unlimited.
The 30-day plan at each brand. Ringo Light is unlimited data at full speed. Ubigi's month is 60 GB at full speed, then 2 Mbps.
Holafly sells no buckets. Ringo Light sells no bucket either: its 2 weeks is unlimited and lasts 2 weeks, not 30 days.
Side by side
Swipe to compare →
Get Ringo Light for South Korea, from $9.99.
Installed once, next to your own SIM. Your eSIM arrives by email in seconds.
- 3 days $9.99
- 2 weeks $23.99
- 30 days $35.99
We sell data eSIMs for now to fund the full Ringo service. Ringo is self funded. Every plan bought here pays for the build of one plan that works everywhere.
Want to keep your own number abroad?
That is the full Ringo service: one plan that works everywhere, with your own number included.
It is a separate product from Ringo Light and it is still being built, so it is not on sale yet. Join the waitlist to hear when it opens.
What to see in South Korea, and what your phone needs for it
Eight places most trips to South Korea include, from the palaces of Seoul to the hillside villages of Busan and Jeonju. Whichever way you connect, the tip under each one is the thing your phone does for you there.
Roam with your carrier, or buy an eSIM
Your carrier will let the phone roam in South Korea without any effort from you, and it prices that convenience by the day. AT&T's International Day Pass is $12 a day there, which is $36 for 3 days, $168 for two weeks and $360 for a month, read 31 October 2026. Verizon's TravelPass lists South Korea at the same $12 a day. Both bill only the days you use the phone, and neither page I read shows a monthly plan, so the month is thirty times the daily price.
Ringo Light is one payment per trip: $9.99 for 3 days, $23.99 for 2 weeks and $35.99 for 30 days. A fortnight in South Korea costs $168 on AT&T's Day Pass or Verizon's TravelPass if you use the phone every day, against $23.99 on Ringo Light, and a month is $360 against $35.99.
Among the travel eSIMs, Ringo Light is also the cheapest unlimited. Ubigi asks $34 for 15 days and $49 for a month, for a fixed amount at full speed. Airalo asks $49 and $69, and Holafly $50.50 and $73.90. For 3 days Nomad charges $11 against $9.99 at Ringo Light.
Here is what your carrier wins, and I would not argue around any of it. Your own number keeps ringing, calls and texts are included, nothing needs installing, a phone with no eSIM slot works, and the charge lands on a bill you already pay. For a layover or a single day, $12 with no setup is the right call. AT&T adds $6 a day for each extra line used on the same day, which is where a family trip gets expensive.
Networks in South Korea, and what changes for a visitor from the United States
Korea has some of the fastest 5G in the world on all three of its networks, so I would not pick a plan on network alone. The travel eSIMs differ in which ones they ride: Airalo uses SK Telecom, Holafly SK Telecom and LG U+, Ubigi LG U+ and SK Telecom, and Nomad all three including KT. Ringo Light runs on a local partner network.
A carrier pass works on different terms. AT&T names South Korea on its Day Pass destination list and charges $12 for each day you use the phone. Verizon lists South Korea at $12 per day, charged only on days of use. On speed, Verizon says 5 GB of high-speed data in each 24-hour session and then unlimited data at 3G speeds until the session ends. AT&T gives no daily high-speed figure for South Korea, so I cannot quote one.
No data plan fixes one thing. Naver Map, KakaoMap, Papago and KakaoT all work on data, but some Korean services ask for a Korean phone number to send a text code, and no data-only travel eSIM provides one.
If you want a data bucket: Ubigi, Nomad or Airalo
- Ubigi, $14 for 10 GB. The cheapest 10 GB for 30 days, and 25 GB for $25, on LG U+ and SK Telecom with 5G. That is little more than one $12 day of roaming.
- Nomad, $18 for 10 GB. 20 GB for $28, which is $7.99 under Ringo Light's 30 days, on all three Korean networks.
- Airalo, $19 for 10 GB. Its Jjang plan rides SK Telecom, and 20 GB costs $30.
- ✓Ringo Light, no buckets. Ringo Light's 2 weeks is unlimited for $23.99 and its 30 days unlimited for $35.99. If you want 10 GB that lasts a month, Ubigi at $14 is the better buy, and Nomad sells 20 GB for $28. I would rather you read that here than at checkout.
What Ringo Light is
Ringo Light is Ringo's own data eSIM, and I write for Ringo, so weigh that. It is sold to fund the full Ringo, one plan that works everywhere with your own number ported onto it. For South Korea it sells three trips, all unlimited data at full speed: 3 days at $9.99, 2 weeks at $23.99 and 30 days at $35.99. Nothing renews. The eSIM arrives by email in seconds and installs in one scan, no app.
The eSIM sits next to your own SIM, so your number keeps working for calls and texts if you leave roaming on for those. AT&T and Verizon both include calls and texts on the pass, as I read their pages, and I would check how your carrier bills a day of use before you rely on it.
The card to buy Ringo Light is further up this page, just after the side-by-side table.
Pick by trip
Ringo Light, 3 days, $9.99, against $36 for three days on AT&T or Verizon. Nomad's 3 days is $11.
Your carrier. A single day is $12, with your own number and nothing to install. Ringo Light starts at 3 days.
Ringo Light, 2 weeks, $23.99, against $168 for a day pass used every day.
Ringo Light, 30 days, $35.99, unlimited data at full speed, against $360 of daily charges. Ubigi at $49 for 60 GB is the fair rival.
Ubigi 10 GB for 30 days at $14, with roaming switched off on your own SIM.
Keep your own SIM in beside the eSIM, or take the day pass. None of the travel eSIMs carries a number; the full Ringo, which Ringo Light funds, ports the number you have.
Frequently asked questions
How we compared, and our sources
Airalo, Holafly, Nomad, Ubigi, AT&T, Ringo Light, Verizon, Ringo Light
We priced Airalo, Holafly, Nomad, Ubigi and Ringo Light for South Korea on 25 October 2026, all on the same day, in US dollars. Each rival's price comes from its own website where it showed dollars, otherwise from an esimdb.com listing, and every source and its date is listed below. Ringo Light's prices come from the catalogue our checkout charges.
We compare the trips people actually book: a week, two weeks and a month of unlimited data, and a 10 GB bucket. We read each brand's fair use and speed rules and quote them as the brands state them. We did not run speed tests, so this page makes no speed claims for any brand.
Ringo Light is our own product. We put it in the table on the same terms as everyone else, and where a rival is the better buy the page says so.
Left out: Saily. I could not read its prices for this country on 22 October (saily.com and esimdb.com refused the fetch), so it has no bar in the charts rather than a guessed one.
- Airalo: www.airalo.com/south-korea-esim?currency=USD, unlimited read on the site in dollars, 25 October 2026; buckets from the esimdb listing dated 4 October 2026
- Holafly: esim.holafly.com/esim-south-korea/, read on the site in dollars, 25 October 2026
- Nomad: www.nomadesim.com/south-korea-esim, read on the site, plan data in dollars, 25 October 2026; 10 GB on sale at $18, regular $20; networks from the same page
- Ubigi: cellulardata.ubigi.com/rates-and-coverage/south-korea-data-plans/south-korea-unlimited-30-days/, 30-day unlimited page read on the site in dollars, 25 October 2026; 7 and 15 day, 10 GB and 25 GB plans from the esimdb listing dated 4 October 2026
- AT&T: www.att.com/international/day-pass/, daily price, additional-line price and data description read here, and South Korea named as a Day Pass destination on https://www.att.com/support/article/wireless/KM1395068/, read 31 October 2026
- Ringo Light: ringoesim.com/south-korea, the catalogue the checkout charges, read the same day
- Verizon: www.verizon.com/support/travelpass-faqs/, TravelPass FAQ for the daily price, the 5 GB allowance and billing on days used, and the TravelPass countries list at verizon.com/plans/travelpass-countries/ for South Korea at $12 per day (the list spells it "Korea"), read 31 October 2026
- Ringo Light: our own catalogue, the prices the checkout charges on 25 October 2026.
Written and priced by the Ringo team. Prices change often; if you spot one that has moved, tell us through the contact page and we will update the table.
