Price checked on October 13, 2026
Firsty eSIM for Vietnam: our review
- Vietnamese networkViettelMobiFone
- Listed
- 4/5 · 335 · Trustpilot
- 6 vietnam plans · from $5.27
- 5G
- Hotspot OK
Verdict
Firsty connects to Viettel, MobiFone. Firsty · 1 GB · No expiry · from $5.27
This page is generated from our eSIM registry and has not yet been reviewed by an editor in this language.
Firsty in Vietnam: the facts
- Vietnamese network
- Viettel, MobiFone
- https://www.firsty.app/en/vietnam-esim
- 5G
- Yes
- Hotspot
- Yes
- Phone number
- calls through the app
- Plan starts
- at first connection in Vietnam
- Top-up
- Yes
- Refunds
- 14-day withdrawal right by email ([email protected]). Full cash refund if device is eSIM-incompatible or activation fails, provided the plan is unused (<10 MB) and the request is made within 14 days. Change of mind / accidental purchase: 90% cash refund (10% fee) or 100% Firsty credit. No refund once >10 MB used; no partial refunds; expired plans never refunded. Technical issues must be reported within 72 h, refunds processed within 5 business days.
- Support
- chat, email, 24/7
- Trustpilot
- 4/5
- 335 · October 13, 2026
- Type
- International eSIM
- Last checked
- October 13, 2026
- Firsty is listed from a one-off check on October 13, 2026; prices may have changed since.
Firsty Vietnam plans and prices
| Plan | Data | Validity | Network | Price | per GB |
|---|---|---|---|---|---|
| Firsty Free (data gratuite contre publicités)Multi-country | 360 MB/day | 7 days | ViettelMobiFone | $0 | $0 |
| Firsty Unlimited day pass 1 jour (palier 1-6 jours, 3,00 €/jour)Multi-country | Unlimited (5 GB/day)then 512 kbps | 1 day | ViettelMobiFone | $3.51 | $0.70 |
| Firsty Classic 1 GB | 1 GB | No expiry | ViettelMobiFone | $5.27 | $5.27 |
| Firsty Classic 3 GB | 3 GB | No expiry | ViettelMobiFone | $8.78 | $2.93 |
| Firsty Classic 5 GB | 5 GB | No expiry | ViettelMobiFone | $11.12 | $2.22 |
| Firsty Classic 10 GB | 10 GB | No expiry | ViettelMobiFone | $19.89 | $1.99 |
| Firsty Unlimited 7 jours (palier 7-14 jours, 2,75 €/jour)Multi-country | Unlimited (5 GB/day)then 512 kbps | 7 days | ViettelMobiFone | $22.52 | $0.64 |
| Firsty Classic 20 GB | 20 GB | No expiry | ViettelMobiFone | $30.89 | $1.54 |
| Firsty Unlimited 15 jours (palier 15-19 jours, 2,50 €/jour)Multi-country | Unlimited (5 GB/day)then 512 kbps | 15 days | ViettelMobiFone | $43.88 | $0.59 |
| Firsty Unlimited 20 jours (palier 20+ jours, 2,20 €/jour)Multi-country | Unlimited (5 GB/day)then 512 kbps | 20 days | ViettelMobiFone | $51.48 | $0.51 |
| Firsty Classic 50 GB | 50 GB | No expiry | ViettelMobiFone | $57.33 | $1.15 |
| Firsty Unlimited abonnement mensuel (59 €/30 jours)Multi-country | Unlimited (5 GB/day)then 512 kbps | 30 days | ViettelMobiFone | $69.03 | $0.46 |
Read on Firsty's website on October 13, 2026. Prices in US dollars, before any promo code.
Firsty promo code
Firsty has no public promo code at the moment. Discounts, when they exist, apply automatically through the link below; we remove codes as soon as they stop working.
What Firsty customers complain about
Trustpilot score 4/5 on 335 reviews (read on October 13, 2026). The recurring themes:
- eSIM fonctionne chez soi mais plus de connexion une fois à l'étranger
- échecs d'activation et fiabilité jugée aléatoire
- qualité médiocre des appels VoIP in-app
- changements de formules réduisant la data incluse
Installing a Firsty eSIM for Vietnam
- Check that your phone is eSIM-compatible and carrier-unlocked (Settings → About → "Digital SIM" or "EID" on Android, "Add eSIM" on iPhone).
- Buy the plan on Firsty's site or app and install it at home on Wi-Fi: scan the QR code or let the app add it.
- Label the line "Vietnam", keep your home SIM for calls and SMS, and turn on data roaming for the eSIM line only.
- Leave mobile data on your home line off before take-off. On landing, select the Firsty line for data: the plan starts counting at first connection.
- No signal after a few minutes? Toggle airplane mode, then pick the network manually in the cellular settings.
Alternatives to Firsty for Vietnam
For the same trip, here is what the other brands charge: (10 days, 5 GB)
- VietnamobileVietnamobile5 GB/day · 10 days$1.54
- ViettelViettel5 GB/day · 15 days$3.09
- MobiFoneMobiFone1 GB/day · 30 days$3.86
Firsty in Vietnam: questions
Which network does Firsty use in Vietnam?
Firsty connects to Viettel, MobiFone. Plans on the Viettel network
Is Firsty's unlimited plan really unlimited?
Firsty does not sell an unlimited plan for Vietnam: all its plans have a fixed data allowance.
Do I get a Vietnamese phone number with Firsty?
No. Firsty is data-only: no Vietnamese number, so no Vietnamese SMS. Calls go through WhatsApp or your home line in roaming.
Can I share Firsty's connection as a hotspot?
Yes
When does the Firsty plan start?
The plan starts at first connection in Vietnam. Install it at home, keep data roaming off on that line until you land.
Related guides
Other eSIM brands for Vietnam
Some links on this page are affiliate links. We may earn a commission if you buy through them, at no extra cost to you. Rankings are not influenced by commissions.