eSIM vs Roaming Plans — Real Cost Comparison
International roaming can cost {price.5}–{price.15} per megabyte with some carriers. A single hour of video streaming could cost {price.500} or more in roaming fees. Here is an honest, numbers-first comparison of eSIM plans vs every roaming alternative.
The true cost of carrier roaming
Home carrier international data charges vary widely:
| Carrier type | Pay-as-you-go rate | Notes |
|---|---|---|
| US carrier (T-Mobile, AT&T, Verizon) roaming | ¥0.07–¥107.10 per MB | Varies by destination country |
| UK carrier (EE, Vodafone, O2) zone 1 | £0.002–£10 per MB | 'Zone 1' countries cheapest |
| Carrier international add-on package | ¥71.40–¥142.80/day or ¥357.00–¥714.00/week | Often throttled to 256 kbps |
| EU roaming (within EU/EEA) | Free at home rates | Genuine exception — no extra charge |
At ¥71.40/MB, a 1 GB video stream costs ¥71,400.00 Even 'day pass' add-ons at ¥71.40/day throttle to 256 kbps — barely enough for maps.
Real cost comparison by trip type
7 days in Europe (5 GB data)
| Option | Cost | Notes |
|---|---|---|
| Carrier roaming (pay-as-you-go) | ¥1,071.00–¥3,570.00 | Extreme bill shock risk |
| Carrier travel package (day pass) | ¥499.80–¥999.60 | ¥71.40/day × 7, often throttled |
| Local physical SIM in France | ¥107.10–¥178.50 | Covers France only, requires store visit |
| LTE.app Europe eSIM (30+ countries) | ¥85.68–¥142.80 | Full LTE speeds, instant activation |
14 days in Asia (10 GB data)
| Option | Cost | Notes |
|---|---|---|
| Carrier roaming | ¥2,142.00–¥7,140.00+ | Extreme risk |
| Carrier international package | ¥571.20–¥1,071.00 | Often insufficient data |
| Local SIM in Japan | ¥107.10–¥178.50 | Japan only, language barrier |
| LTE.app Asia regional eSIM | ¥107.10–¥249.90 | Covers Japan, Korea, Taiwan |
3 days in the US (2 GB data)
| Option | Cost | Notes |
|---|---|---|
| Carrier roaming day pass | ¥214.20–¥428.40 | ¥71.40–¥142.80/day |
| US prepaid local SIM (Mint, T-Mobile) | ¥107.10–¥142.80 | Physical store required |
| LTE.app US eSIM | ¥57.12–¥107.10 | Instant QR, full LTE |
Hidden roaming charges that multiply the cost
When roaming actually makes sense
LTE.app membership makes eSIM even cheaper
LTE.app Pro membership (¥71.33/mo) saves 7% on every eSIM plan. Premium (¥142.73/mo) saves 12%. For frequent travelers purchasing 3–4 plans per month, the membership pays for itself:
| Travel pattern | Monthly plan spend | Pro saves | Premium saves |
|---|---|---|---|
| 1 trip/month (1 plan) | ¥107.10 | ¥7.50 | ¥12.85 |
| 2 trips/month (3 plans) | ¥321.30 | ¥22.49 | ¥38.56 |
| 4 trips/month (6 plans) | ¥642.60 | ¥44.98 | ¥77.11 |
| Heavy traveler (10 plans) | ¥1,071.00 | ¥74.97 | ¥128.52 |
At 6+ plans per month, Pro pays for itself. At 10+ plans per month, Premium pays for itself.