For a week in South Korea, Taiwan Mobile's 1 GB roaming pack and a 500 MB add-on cost TWD 149 + TWD 79 = TWD 228, and Far EasTone's 2 GB pack costs TWD 249. 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 $2.50 in South Korea at $1.81/GB, metered by the KB. For this trip, Bcengi is about 3 times cheaper than Taiwan Mobile and about 3 times cheaper than Far EasTone.
This page compares Taiwan Mobile's and Far EasTone's roaming packs with paying as you go for travelers from Taiwan, on a typical 7-day trip and, with Taiwan Mobile in the United States, on a heavy one. Each carrier's prices are as listed on its own website, read October 3, 2026.
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) and the 90th percentile (6.50 GB) from the usage report, times the country's rate on October 3, 2026.
Taiwan Mobile
Taiwan Mobile's 1 GB pack is TWD 149 for 15 days in South Korea, Thailand and Hong Kong, and TWD 79 adds 500 MB before it expires: TWD 228 covers a median trip with Taiwan Mobile. In the United States, Taiwan Mobile's 3 GB pack is TWD 399 for 30 days, and its 5 GB pack TWD 599, with 500 MB more for TWD 99 (Taiwan Mobile's website, read October 3, 2026).
The trip uses 1.38 GB of Taiwan Mobile's 3 GB pack in the United States, so more than half of what you paid for is left unused when the pack expires.
- South Korea, Thailand and Hong Kong: a median 7-day trip (1.38 GB at $1.81/GB) costs $2.50 with Bcengi. Against Taiwan Mobile's 1 GB pack and a 500 MB add-on (TWD 228), the trip is about 3 times cheaper.
- United States rates: a median 7-day trip (1.38 GB at $1.68/GB) costs $2.32 with Bcengi; at the 90th percentile (6.50 GB at $1.68/GB), $10.92. Against Taiwan Mobile's 3 GB pack (TWD 399), the median trip is about 5.5 times cheaper; against Taiwan Mobile's 5 GB pack and three 500 MB add-ons (TWD 896), the 90th percentile trip is about 2.5 times cheaper.
Far EasTone
Far EasTone's 2 GB pack is TWD 249 for 15 days in Japan, South Korea, Thailand and Hong Kong, and TWD 268 for 30 days in the United States (Far EasTone's website, read October 3, 2026).
The trip uses 1.38 GB of Far EasTone's 2 GB pack, so nearly a third of what you paid for is left unused when the pack expires.
- Japan rates: a median 7-day trip (1.38 GB at $2.82/GB) costs $3.89 with Bcengi. Against Far EasTone's 2 GB pack (TWD 249 for 15 days), the trip is about 2 times cheaper.
- South Korea, Thailand and Hong Kong: a median 7-day trip (1.38 GB at $1.81/GB) costs $2.50 with Bcengi. Against Far EasTone's 2 GB pack (TWD 249 for 15 days), the trip is about 3 times cheaper.
- United States rates: a median 7-day trip (1.38 GB at $1.68/GB) costs $2.32 with Bcengi. Against Far EasTone's 2 GB pack (TWD 268 for 30 days), the trip is about 3.5 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.
Taiwan Mobile and Far EasTone roaming questions
How much is Far EasTone roaming in Japan?
Far EasTone's 2 GB pack for Japan is TWD 249 for 15 days, and a median 7-day trip uses 1.38 GB of it.
How do I use a travel eSIM instead of roaming?
Install the eSIM before you leave, set it as your data line, and turn data roaming off for your Taiwan Mobile or Far EasTone 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 3, 2026. Rates can change; the pricing page always has the current ones.
Each comparison converts Taiwan dollars to US dollars at the Federal Reserve's rate for September 25, 2026, 31.82 Taiwan dollars per US dollar.
Updated October 3, 2026. Sources: Taiwan Mobile's postpaid roaming pages; Far EasTone's roaming country pages; Federal Reserve exchange rates; Bcengi 2026 International Mobile Data Usage Report; Bcengi pricing page.
