On Korean plans that do not include roaming, a week of data in Japan costs ₩29,000 (US$21.38) with SK Telecom's baro 3GB or LG U+'s 로밍패스 4GB, and ₩33,000 (US$24.33) with KT's 함께 쓰는 로밍 5GB. Travel periods of 6 to 8 days used a median of 1.38 GB in Bcengi's 2026 sample. Paying as you go, that trip's 1.38 GB costs $3.89 in Japan at $2.82/GB, metered by the KB (Bcengi's prices are in US dollars). For this trip, Bcengi is about 5.5 times cheaper than SK Telecom and LG U+ and about 6.5 times cheaper than KT.
This page is for SK Telecom, KT and LG U+ plans that do not include roaming, at each pass's regular price. Each carrier's prices are as listed on its own website, read October 4, 2026.
What SK Telecom, KT and LG U+ charge for roaming data
- SK Telecom: the baro 3GB costs ₩29,000 (US$21.38) for 3 GB, usable for up to 30 days in 195 countries.
- The trip uses 1.38 GB of the 3 GB pass, so more than half of what you paid for is left unused when it expires.
- KT: the 함께 쓰는 로밍 5GB costs ₩33,000 (US$24.33) for 5 GB over 30 days; the 동남아 알뜰 로밍 costs ₩25,000 (US$18.43) for 3 GB over 7 days in six Southeast Asian countries, Vietnam and Thailand among them.
- The trip uses 1.38 GB of the 5 GB pass, so nearly three quarters of what you paid for is left unused when it expires.
- With the 3 GB 동남아 알뜰 로밍, the trip leaves more than half of the data unused.
- LG U+: the 로밍패스 4GB costs ₩29,000 (US$21.38) for up to 30 days in 83 countries; it holds 3 GB, or 4 GB when bought online.
- With 4 GB, the trip's 1.38 GB leaves nearly two thirds of what you paid for unused when it expires; with 3 GB, more than half.
What a 7-day trip costs: a roaming pass or paying as you go
Paying as you go with Bcengi, a trip costs what its data costs. Each line below is a model for a trip of 6 to 8 days: the median (1.38 GB) from the usage report, times the country's rate on October 4, 2026.
SK Telecom baro
- Japan rates: a median 7-day trip (1.38 GB at $2.82/GB) costs $3.89 with Bcengi. Against SK Telecom's baro 3GB, the trip is about 5.5 times cheaper.
- Vietnam rates: a median 7-day trip (1.38 GB at $2.51/GB) costs $3.46 with Bcengi. Against SK Telecom's baro 3GB, the trip is about 6 times cheaper.
- Thailand rates: a median 7-day trip (1.38 GB at $1.81/GB) costs $2.50 with Bcengi. Against SK Telecom's baro 3GB, the trip is about 8.5 times cheaper.
- China and United States: a median 7-day trip (1.38 GB at $1.68/GB) costs $2.32 with Bcengi. Against SK Telecom's baro 3GB, the trip is about 9 times cheaper.
KT passes
- Japan rates: a median 7-day trip (1.38 GB at $2.82/GB) costs $3.89 with Bcengi. Against KT's 함께 쓰는 로밍 5GB, the trip is about 6.5 times cheaper.
- China and United States: a median 7-day trip (1.38 GB at $1.68/GB) costs $2.32 with Bcengi. Against KT's 함께 쓰는 로밍 5GB, the trip is about 10 times cheaper.
- Vietnam rates: a median 7-day trip (1.38 GB at $2.51/GB) costs $3.46 with Bcengi. Against KT's 동남아 알뜰 로밍, the trip is about 5.5 times cheaper.
- Thailand rates: a median 7-day trip (1.38 GB at $1.81/GB) costs $2.50 with Bcengi. Against KT's 동남아 알뜰 로밍, the trip is about 7.5 times cheaper.
LG U+ 로밍패스
- Japan rates: a median 7-day trip (1.38 GB at $2.82/GB) costs $3.89 with Bcengi. Against LG U+'s 로밍패스 4GB, the trip is about 5.5 times cheaper.
- Vietnam rates: a median 7-day trip (1.38 GB at $2.51/GB) costs $3.46 with Bcengi. Against LG U+'s 로밍패스 4GB, the trip is about 6 times cheaper.
- Thailand rates: a median 7-day trip (1.38 GB at $1.81/GB) costs $2.50 with Bcengi. Against LG U+'s 로밍패스 4GB, the trip is about 8.5 times cheaper.
- China and United States: a median 7-day trip (1.38 GB at $1.68/GB) costs $2.32 with Bcengi. Against LG U+'s 로밍패스 4GB, the trip is about 9 times cheaper.
For how bundles and pay as you go compare, see bundles vs pay as you go.
What you get with Bcengi
- One reusable eSIM: install it once and use it on every trip.
- A balance that never expires: what one trip does not use is there for the next.
- No plan to pick: you never guess a size before you travel.
- Top up any time, by hand or with auto-refill.
- Your phone number stays on your home SIM for calls and texts; Bcengi is data only.
SK Telecom, KT and LG U+ roaming questions
How much is KT roaming?
KT's 함께 쓰는 로밍 costs ₩33,000 for 5 GB over 30 days, and its 동남아 알뜰 로밍 ₩25,000 for 3 GB over 7 days in six Southeast Asian countries.
How much is SK Telecom's baro?
SK Telecom's baro 3GB costs ₩29,000 and can be used for up to 30 days in 195 countries.
How do I use a travel eSIM instead of SK Telecom, KT or LG U+ roaming?
Install the eSIM before you leave, set it as your data line, and turn data roaming off for your SK Telecom, KT or LG U+ line so it does not use data abroad. See turn roaming off on your home line.
How these figures were measured
The usage figures come from Bcengi's 2026 International Mobile Data Usage Report: a stratified random sample of 10,000 travel periods, with usage from January 1 to September 30, 2026. The figures cover every destination in the sample, not one country.
Each trip cost on this page is a model, not a bill: the GB a trip used times the per-GB rate on our pricing page on October 4, 2026. Rates can change; the pricing page always has the current ones.
Won prices are converted to US dollars at the Federal Reserve's rate for September 25, 2026, 1,356.51 won per US dollar.
Updated October 4, 2026. Sources: SK Telecom's baro page, KT's 함께 쓰는 로밍 and 동남아 알뜰 로밍 pages and LG U+'s 로밍패스 page; Federal Reserve exchange rates; Bcengi 2026 International Mobile Data Usage Report; Bcengi pricing page.
