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 | ￥1–￥2,235 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 | ￥1,490–￥2,980/day or ￥7,450–￥14,900/week | Often throttled to 256 kbps |
| EU roaming (within EU/EEA) | Free at home rates | Genuine exception — no extra charge |
At ￥1,490/MB, a 1 GB video stream costs ￥1,490,000 Even 'day pass' add-ons at ￥1,490/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) | ￥22,350–￥74,500 | Extreme bill shock risk |
| Carrier travel package (day pass) | ￥10,430–￥20,860 | ￥1,490/day × 7, often throttled |
| Local physical SIM in France | ￥2,235–￥3,725 | Covers France only, requires store visit |
| LTE.app Europe eSIM (30+ countries) | ￥1,788–￥2,980 | Full LTE speeds, instant activation |
14 days in Asia (10 GB data)
| Option | Cost | Notes |
|---|---|---|
| Carrier roaming | ￥44,700–￥149,000+ | Extreme risk |
| Carrier international package | ￥11,920–￥22,350 | Often insufficient data |
| Local SIM in Japan | ￥2,235–￥3,725 | Japan only, language barrier |
| LTE.app Asia regional eSIM | ￥2,235–￥5,215 | Covers Japan, Korea, Taiwan |
3 days in the US (2 GB data)
| Option | Cost | Notes |
|---|---|---|
| Carrier roaming day pass | ￥4,470–￥8,940 | ￥1,490–￥2,980/day |
| US prepaid local SIM (Mint, T-Mobile) | ￥2,235–￥2,980 | Physical store required |
| LTE.app US eSIM | ￥1,192–￥2,235 | 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 (￥1,489/mo) saves 7% on every eSIM plan. Premium (￥2,979/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) | ￥2,235 | ￥156 | ￥268 |
| 2 trips/month (3 plans) | ￥6,705 | ￥469 | ￥805 |
| 4 trips/month (6 plans) | ￥13,410 | ￥939 | ￥1,609 |
| Heavy traveler (10 plans) | ￥22,350 | ￥1,565 | ￥2,682 |
At 6+ plans per month, Pro pays for itself. At 10+ plans per month, Premium pays for itself.