Price checked on October 13, 2026
KnowRoaming eSIM for Vietnam: our review
- Vietnamese networkViettelMobiFone
- Listed
- 4/5 · 94 · Trustpilot
- 12 vietnam plans · from $3.50
- 5G
- Hotspot OK
- Unlimited
Verdict
KnowRoaming connects to Viettel, MobiFone. KnowRoaming · Unlimited · 1 day · from $3.50
This page is generated from our eSIM registry and has not yet been reviewed by an editor in this language.
KnowRoaming in Vietnam: the facts
- Vietnamese network
- Viettel, MobiFone
- https://www.knowroaming.com/esims/vietnam
- 5G
- Yes
- Hotspot
- Yes
- Phone number
- data only
- Plan starts
- at first connection in Vietnam
- Top-up
- Yes
- Refunds
- Full refund if the eSIM was never installed or installed but never connected; request within 90 days of purchase and before validity ends. After first connection, refund is discretionary (full or partial) if under 2 % of data used or fault on KnowRoaming's side. Approved refunds paid within 15 calendar days.
- Support
- whatsapp, email, chat, 24/7
- Trustpilot
- 4/5
- 94 · October 13, 2026
- Unlimited
- Not stated
- Type
- International eSIM
- Last checked
- October 13, 2026
- KnowRoaming is listed from a one-off check on October 13, 2026; prices may have changed since.
KnowRoaming Vietnam plans and prices
| Plan | Data | Validity | Network | Price | per GB |
|---|---|---|---|---|---|
| Vietnam Unlimited 1 Day | Unlimitedthen 512 kbps | 1 day | ViettelMobiFone | $3.50 | — |
| Vietnam 1 GB 7 Days | 1 GB | 7 days | ViettelMobiFone | $3.75 | $3.75 |
| Vietnam 3 GB 10 Days | 3 GB | 10 days | ViettelMobiFone | $7 | $2.33 |
| Vietnam 5 GB 15 Days | 5 GB | 15 days | ViettelMobiFone | $9.50 | $1.90 |
| Vietnam Unlimited 3 Days | Unlimitedthen 512 kbps | 3 days | ViettelMobiFone | $10.25 | — |
| Vietnam 10 GB 30 Days | 10 GB | 30 days | ViettelMobiFone | $15.25 | $1.53 |
| Vietnam Unlimited 5 Days | Unlimitedthen 512 kbps | 5 days | ViettelMobiFone | $17 | — |
| Asia 10 GB 30 DaysMulti-country | 10 GB | 30 days | ViettelMobiFone | $22.75 | $2.28 |
| Vietnam Unlimited 7 Days | Unlimitedthen 512 kbps | 7 days | ViettelMobiFone | $24.25 | — |
| Vietnam 20 GB 30 Days | 20 GB | 30 days | ViettelMobiFone | $26.50 | $1.33 |
| Vietnam Unlimited 10 Days | Unlimitedthen 512 kbps | 10 days | ViettelMobiFone | $31.50 | — |
| Asia Unlimited 10 DaysMulti-country | Unlimited | 10 days | ViettelMobiFone | $34 | — |
| Vietnam Unlimited 15 Days | Unlimitedthen 512 kbps | 15 days | ViettelMobiFone | $44 | — |
| Vietnam Unlimited 30 Days | Unlimitedthen 512 kbps | 30 days | ViettelMobiFone | $64.75 | — |
Read on KnowRoaming's website on October 13, 2026. Prices in US dollars, before any promo code.
KnowRoaming promo code
KnowRoaming 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 KnowRoaming customers complain about
Trustpilot score 4/5 on 94 reviews (read on October 13, 2026). The recurring themes:
- eSIM qui ne se connecte pas malgré le dépannage (APN manuel)
- support par agent IA puis chat fermé avant résolution, relances avec de nouveaux agents
- recharges payées non créditées et remboursements partiels
- forfaits illimités fortement bridés après quelques heures
Installing a KnowRoaming 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 KnowRoaming'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 KnowRoaming 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 KnowRoaming 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
KnowRoaming in Vietnam: questions
Which network does KnowRoaming use in Vietnam?
KnowRoaming connects to Viettel, MobiFone. Plans on the Viettel network
Is KnowRoaming's unlimited plan really unlimited?
No. KnowRoaming applies a daily fair-use cap: 512 kbps. Light use is never affected; video and tethering are.
Do I get a Vietnamese phone number with KnowRoaming?
No. KnowRoaming is data-only: no Vietnamese number, so no Vietnamese SMS. Calls go through WhatsApp or your home line in roaming.
Can I share KnowRoaming's connection as a hotspot?
Yes
When does the KnowRoaming 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
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