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Sherpa Expert Review
Ubigi eSIM Review (2026)
Carrier-grade speed, backed by NTT.
Summary
Carrier-grade MVNO backed by NTT, ranked fastest overall in a 2026 independent eSIM speed study, especially strong in Japan and Korea. Reusable eSIM you install once and top up per destination; plans can be bought up to 6 months ahead.
Sherpa Verdict
Speed matters most. Independent 2026 testing ranked Ubigi fastest overall, and it is particularly strong in Japan, Korea, and the rest of Asia.
Pros
- • Fastest overall in independent 2026 speed testing
- • Install once, reuse forever with top-ups
- • NTT carrier backing means solid network deals
Cons
- • Interface feels more corporate than consumer
- • No public affiliate or referral perks
| Coverage | 200+ destinations |
| Parent company | Transatel (NTT Group) |
| Operating since | 2017 |
| Unlimited plans | Varies by destination |
| Pricing | Reusable eSIM you install once and top up per destination; plans can be bought up to 6 months ahead |
Sherpa Score
4.6
Excellent Choice
Speed & Latency 4.7 / 5.0
Coverage & Reliability 4.8 / 5.0
Value for Money 4.6 / 5.0