Best eSIM for Vietnam 2026: Viettel for Sapa, the Ha Giang Loop & Con Dao
Viettel is the only Vietnamese network reliable on Sapa treks above 1,500 m, the Ha Giang Loop mountain switchbacks, and Con Dao — 98.6% 4G / 91.2% 5G population coverage, military-owned. A 5 GB Viettel-backed travel eSIM runs about US$7.
Published June 27, 2026·Updated August 20, 2026·6 min read
30-day auto-refund on no usageSummary
For 2026 travel in Vietnam, a Viettel-backed travel eSIM is the safest pick because Viettel is the only network with reliable signal on Sapa treks above 1,500 m, the Ha Giang Loop mountain switchbacks, and Con Dao — roughly 98.6% of the population on 4G and 91.2% on 5G, military-owned. A 5 GB Viettel-backed plan runs about US$7 — a fraction of home-carrier roaming for the same week.
| Plan | Price | Network | Speed | After daily allowance | IP breakout |
|---|---|---|---|---|---|
| Day Pass · 500 MB/day at full speed · Flexible 1–365 days | US$3.99 | Viettel Mobile / Vinaphone / MobiFone | 5G | 512 Kbps | SG |
| 3.0 GB · 30 days | US$4.99 | Viettel Mobile / MobiFone / Vinaphone | 5G | — | HK |
| 50 GB · 180 days | US$75.99 | Viettel Mobile / MobiFone / Vinaphone | 5G | — | HK |
Hotspot and tethering are allowed on every plan we sell. Plans are data-only unless the plan page states otherwise — only selected plans carry calls or SMS. IP breakout is where your traffic exits the network, which is not always the country you are visiting. Prices and networks are read from the same catalogue that powers our machine-readable pricing file, so this table cannot go stale against checkout.
Vietnam mobile networks in 2026
Vietnam has three main carriers — Viettel, Vinaphone, and MobiFone. Coverage is excellent across Hanoi, HCMC, Da Nang, Hoi An, Nha Trang, and Ha Long on all three, but Viettel widens the gap the moment you leave the main cities — it's the only carrier that reliably reaches Sapa villages above 1,500 m, the Ha Giang Loop mountain switchbacks, and Con Dao. Vinaphone is a solid second with strong 5G in the major cities; MobiFone works in towns but thins in remote areas. Most travel eSIMs for Vietnam route through Viettel or Vinaphone.
Vietnam eSIM 2026: who wins on what
Five brands, the same five questions, in every country guide we publish. Coverage figures are each brand’s own published network list; price and plan figures come from esimDB, checked 18 August 2026. Where a brand publishes nothing, it is marked as such rather than guessed at.
| Category | Winner | Runner-up | On what basis |
|---|---|---|---|
| Widest coverage | YonoSIM | Airalo | 2 networks published vs 1 |
| Cheapest per GB | Nomad | Airalo | $0.78/GB vs $0.89 — at 50GB/$39/30d |
| Widest plan range | Saily | YonoSIM | 9 distinct data sizes vs 8 |
| Publishes its network | YonoSIM & Airalo | — | Nomad, Saily, Holafly name no carrier |
| Brand | Networks in Vietnam | Best $/GB | Plans | Sizes |
|---|---|---|---|---|
| YonoSIM | Viettel (5G) · Vinaphone (5G) | $1.25 | 75 | 8 |
| Airalo | VNPT (Vinaphone) | $0.89 | 56 | 8 |
| Nomad | Not disclosed | $0.78 | 35 | 8 |
| Saily | Not disclosed | $1.45 | 33 | 9 |
| Holafly | Not disclosed | — | — | — |
Networks are each brand's own published figure. Prices, plan counts, and data sizes via esimDB, checked 18 August 2026. Holafly publishes neither a per-country carrier nor plans on esimDB, so it cannot be scored on price or range here. Plan range is counted in distinct data sizes, not plan count.
Which one to pick
- Going beyond the cities? YonoSIM publishes the most networks here (Viettel (5G) · Vinaphone (5G)), which is what decides whether the map still loads when one carrier thins out.
- Cheapest data right now is Nomad at $0.78/GB — YonoSIM is $1.25. If price is the only thing you are optimising, buy theirs.
- Want an unusual data size? Saily offers the most granular ladder (9 distinct sizes).
- Want the data back if you don’t use it? YonoSIM refunds unused data automatically after 30 days; the others require you to ask. Check each brand’s current terms before you buy.
Plan size by trip length
| Trip length | Data | Typical price | Best for |
|---|---|---|---|
| 3–5 days (city) | 3–5 GB | US$4–7 | Hanoi or HCMC only |
| 7 days (classic loop) | 5–10 GB | US$7–13 | Standard tourist week |
| Ha Giang / Sapa / Con Dao | 10–20 GB (Viettel) | US$13–25 | Mountain / remote reliability |
| 10+ days / N-S route | Unlimited | US$18–25 | Digital nomad, heavy hotspot |
eSIM vs roaming vs pocket Wi-Fi for Vietnam
| Option | Cost (7 days) | Setup time | Coverage |
|---|---|---|---|
| eSIM (Viettel) | US$7–13 | ~5 min pre-install | Excellent (incl. Ha Giang, Sapa, Con Dao) |
| Carrier roaming (US/UK) | US$70–105 | Instant | Medium (partner-dependent) |
| Pocket Wi-Fi | US$30–50 | Airport pickup | Good (extra device to charge) |
Picking the right Vietnam eSIM
City break (3–5 days): a 3–5 GB plan at US$4–7 is plenty for Grab, maps, and social.
Standard tourist week: a 5 GB Viettel-backed plan at about US$7.
Ha Giang Loop, Sapa trekking, or Con Dao: Viettel is the only carrier that reliably reaches these zones — size up to 10–20 GB so maps stay live on the mountain switchbacks between towns.
North-to-south route or nomad stay (10+ days): jump to unlimited at US$18–25 so hotspot tethering stays usable. Browse our Vietnam eSIM plans for the full lineup.
FAQ
QWhich travel eSIMs ride Viettel in Vietnam?
AYonoSIM routes across Viettel and Vinaphone. Airalo publishes VNPT (Vinaphone) as its Vietnamese network. Saily, Holafly, and Nomad do not disclose theirs. Viettel is military-operated, has the widest rural footprint by a distance, and is the one to insist on if your trip includes the Ha Giang loop, Sapa, or Phong Nha. For Hanoi, Da Nang, and Ho Chi Minh City, either network is fine.
QWhich Vietnamese carrier is best for Sapa, the Ha Giang Loop, and remote islands?
AViettel is the only network with reliable signal on Sapa treks above 1,500 m, the Ha Giang Loop mountain switchbacks, and Con Dao. Military-owned Viettel covers roughly 98.6% of the population on 4G and 91.2% on 5G — by far the widest rural reach. For anything beyond Hanoi and HCMC, choose a Viettel-backed eSIM. A 5 GB plan runs about US$7.
QHow much data do I need for a 1-week Vietnam trip?
A5–10 GB (roughly 1 GB/day) covers Google Maps, Grab, WhatsApp, and social for a standard week — a Viettel-backed 5 GB plan is about US$7. Heavy users who tether or stream should pick 10 GB+ or an unlimited daily-throttle plan.
QDo Vietnam travel eSIMs come with a local phone number?
AMost travel eSIMs are data-only and do not include a Vietnamese number. That is fine for tourists — Grab, maps, and WhatsApp run on data. If you specifically need a local number, choose a Vinaphone-based plan that bundles one, or buy a physical SIM.
QDo I need to register my eSIM with my passport in Vietnam?
ANo — travel eSIMs sold by international providers like YonoSIM work without local registration. You buy online, scan the QR, and connect on arrival. Buying a physical local SIM in Vietnam does require passport registration at the shop.
Bottom line
For most Vietnam trips, a Viettel-backed travel eSIM is the right call — 5 GB for a Hanoi or HCMC city break, 5 GB (~US$7) for a standard week, 10–20 GB for the Ha Giang Loop, Sapa, or Con Dao. Viettel holds where Vinaphone and MobiFone drop on the mountain switchbacks and remote islands. Install before you fly and skip the airport SIM queue.
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Originally published on www.yonosim.com/en/blog/best-esim-vietnam-2026 · YonoSIM — You Only Need One SIM