eSIM for Vietnam: prices, coverage from Hanoi to the Ha Giang Loop
What mobile data costs in Vietnam, where coverage holds up and where it doesn't, the 2026 face-scan rules for local SIMs, and how to get online the moment you land.
· 6 min read
A travel eSIM for Vietnam gives you prepaid mobile data from the moment you land in Hanoi, Ho Chi Minh City or Da Nang, with no airport kiosk and no passport-and-face-scan registration. Coverage is strong in cities and along the main north–south route, 5G is now live in most major cities, and the mountains of the far north are where it gets patchy. Cabin Mode's Vietnam plans run from 1 GB to 50 GB; below is how to choose.
What Vietnam data costs
| Data | Valid for | Price (USD) | Per GB |
|---|---|---|---|
| 1 GB | 7 days | $1.70 | $1.70 |
| 3 GB | 30 days | $4.80 | $1.60 |
| 5 GB | 30 days | $7.54 | $1.51 |
| 10 GB | 30 days | $13.76 | $1.38 |
| 20 GB | 30 days | $25.26 | $1.26 |
| 50 GB | 180 days | $87.36 | $1.75 |
Prices checked 25 September 2026; the app shows current prices in your currency. See every Vietnam plan.
Vietnam sits a little above Thailand per GB but is still cheap by any European or American standard. The 50 GB plan's 180-day validity is for people who come and go over several months, not a normal holiday; for a three- or four-week trip the 20 GB plan is the better buy. There are also 1 GB day passes from $1.60 if you're only passing through.
How much data for Vietnam
Most Vietnam itineraries run the length of the country: Hanoi, Ha Long Bay, Hoi An, Da Nang, then south to Ho Chi Minh City and the Mekong Delta. That means sleeper buses, domestic flights, a lot of ride-hailing and a lot of maps.
- Light (maps and messages): 3 GB for two weeks
- Typical (plus Grab, social media, translation): 5–10 GB for two weeks, 10–20 GB for a month
- Heavy (video calls, working on the road, streaming on long bus rides): 20 GB or more
Google Translate's camera mode is worth having on menus and bus tickets, and it uses more data than you'd guess. Download the Vietnamese language pack for offline use before you go. The general sizing guide is in how much data do I need for a trip.
Coverage in Vietnam
Cities. Hanoi, Ho Chi Minh City, Da Nang, Hai Phong and Can Tho have dense 4G and, since the 2024–2025 rollout, 5G across central districts. Hoi An, Hue, Nha Trang and Da Lat are well covered.
The main tourist routes. The coastal highway and rail line are mostly covered on 4G. Expect drops in the Hai Van Pass tunnels and in stretches between towns, especially on overnight trains.
Ha Long Bay and Lan Ha Bay. Good at the piers and in Bai Chay; out on the bay, cruise boats usually get 4G that comes and goes. Most boats have wifi of varying quality.
The far north. Sapa town has good signal, but trekking valleys around it drop to 4G or weaker. The Ha Giang Loop has long stretches with thin or no signal, particularly on the higher passes. Download offline maps for the whole loop and tell someone your route.
Phong Nha and the central highlands. Fine in the towns, gone inside the caves and in the national park.
Phu Quoc and Con Dao. The main towns and beaches are covered; quieter corners of the islands are 4G at best.
Cabin Mode's standard Vietnam plans support 5G where the partner network has it, and fall back to 4G or 3G elsewhere.
Local SIM or travel eSIM in Vietnam
Vietnam tightened SIM rules in April 2026: new mobile subscriptions now need facial biometric verification alongside your passport details, whether you register in a store or in an operator's app. Tourist SIM cards from official airport counters still take care of this for you, and it's quick when the counter is quiet. It's less quick at Tan Son Nhat at midnight with three long-haul flights landing.
A travel eSIM avoids that step. You buy and install it at home, it connects to a Vietnamese network as a roaming line, and your usual SIM stays in the phone for texts and bank codes.
Reasons you might still want a local SIM card: a Vietnamese number for local banking or wallets like MoMo, or a long stay where you want a local plan. For most trips, you don't need one. Travel eSIM vs roaming vs a local SIM covers the trade-offs in more detail.
Avoid the unregistered SIMs sold on the street. They're cheap because they're not registered to you, and they can be cut off without notice.
Do you need a Vietnamese phone number?
Usually not. Cabin Mode is data only, so you won't get a Vietnamese number, but:
- Grab works with an international number. Register before you fly so the one-time code arrives on your home network. Local alternatives like Be and Xanh SM are widely used too; if one won't verify your number, another usually will.
- WhatsApp and iMessage keep working on your usual number. Many hotels, tour operators and motorbike rental shops take bookings over WhatsApp. Zalo is the dominant local messaging app, but tourist-facing businesses almost always use WhatsApp as well.
- Sleeper buses and trains can be booked online with an international number and an email address.
Keep your home line on for calls and texts, with data roaming off for it, so verification codes still arrive.
Arriving in Vietnam
Install the eSIM before you leave, on home wifi. The walkthrough is in how to install an eSIM on iPhone. On landing at Noi Bai, Tan Son Nhat or Da Nang:
- Set mobile data to the Cabin Mode line in Settings › Cellular (Mobile Service in some regions).
- Turn on data roaming for that line.
- Keep data roaming off for your home line.
Having data before immigration means you can book a Grab from the arrivals hall at a fixed fare rather than negotiating with airport taxis.
Vietnam with Cambodia, Laos or Thailand
Vietnam is often the middle of a longer trip: Cambodia via the Mekong or Phnom Penh, Laos via the northern border, or a flight on to Bangkok. A regional plan puts all of them on one eSIM:
- South East Asia (8 areas) covers Vietnam, Thailand, Cambodia, Laos, Malaysia, Indonesia, the Philippines and Timor-Leste. 10 GB for 30 days is $16.20.
That's only a little more than Vietnam's own 10 GB plan, so if you're crossing even one border it's worth it. The full comparison, including plans that add Singapore, is in the Southeast Asia backpacking eSIM guide. Single-country plans also exist for Cambodia and Laos.
Top-ups and hotspots
If you run low, a top-up adds data to the same eSIM with nothing to reinstall. Usage figures in the app lag by one to three hours, so leave a margin. Personal Hotspot usually works for sharing with a laptop or a travel companion's phone, but it draws from the same allowance, and a laptop on a long bus ride can use 1 GB before you notice.
Frequently asked questions
Is an eSIM better than a SIM card in Vietnam?
For a typical trip, yes. You skip the airport counter and the biometric registration required for local SIMs since April 2026, and your home SIM stays in the phone. A local SIM card makes sense if you need a Vietnamese phone number.
How much data do I need for two weeks in Vietnam?
Around 5–10 GB for typical use: maps, Grab, messaging, social media and translation. Take 10 GB if you post video or make video calls.
Does Grab work in Vietnam with a foreign phone number?
Yes. Grab accepts international numbers. Sign up at home so the verification code reaches your home SIM without roaming problems.
Is there mobile signal on the Ha Giang Loop?
In towns, yes. On the higher passes and between villages there are long gaps on every network. Download offline maps and your accommodation details before you set off each morning.
Is there 5G in Vietnam?
Yes. Commercial 5G launched in late 2024 and now covers central districts of the major cities. Outside them, you'll mostly be on 4G.