Vietnam eSIM at a glance
Vietnam eSIM plans start at €2.75 for 500MB over a day and reach €54.99 for unlimited data over 30 days. Coverage uses Viettel (military-owned, the largest network), Vinaphone, and Mobifone. 5G is live in Ho Chi Minh City, Hanoi, Da Nang, Hai Phong, and Can Tho. 4G LTE covers the entire country including the Mekong Delta, Ha Long Bay, and the central mountain roads. Activation takes about 90 seconds.
Networks
Viettel, Vinaphone, Mobifone (4G / 5G)
Activation
Under 90 seconds via QR
Currency
VND (₫)
Capital
Hanoi
Plug type
Type A / Type C / Type F (220V)
Best time
November to April is the best window for most of Vietnam. The north (Hanoi, Sapa, Ha Long) gets cold and grey December to February. The south stays warm year-round.
Vietnam eSIM plans
Most-picked plans for Vietnam. Prices adjusted for local network costs. All plans include hotspot and tethering.
How a Vietnam eSIM compares
Carrier roaming
~€11/day
≈ €154 for 2 weeks
Typical international roaming charge from major EU/UK/US carriers in Vietnam. Caps often activate after €60/month and throttle to dial-up speeds.
Local SIM at airport
€15 to €40
one-time plus setup hassle
Viettel and Vinaphone tourist SIMs cost €15 to €25 at airport kiosks in Hanoi (HAN), HCMC (SGN), or Da Nang (DAD). Activation requires passport registration. Most kiosks are open 24 hours, which is more than you can say in many countries.
RoamingFlex eSIM
€8.79
3GB / 15 days
Same plan covers 2 weeks of travel in Vietnam. QR code in under 90 seconds. No app, no airport queue, no passport scan.
How much data you actually need in Vietnam
Tourists in Vietnam average 400MB/day. Vietnam tourist data averages 370 to 440 MB per day. Grab dominates ride-hailing and food (Be is the growing local alternative), Google Maps for navigation, and Google Translate for menus. Vietnamese street-food culture leans heavily on translation apps if you don't speak the language. Source: RoamingFlex 22-destination data usage dataset (CC BY 4.0).
Insider tip
Use Grab's motorbike option (GrabBike) for short city distances in Hanoi or HCMC. It costs about a third of GrabCar and avoids the traffic in ways cars cannot. The driver provides a helmet. The map shows the exact route and fare upfront, so there's no negotiation.
How to activate your Vietnam eSIM
- 1
Buy a Vietnam plan
Pick a plan above based on your trip length. Pay by card or wallet. Checkout takes under a minute.
- 2
Receive your QR code
You'll see the QR code on screen the moment payment clears and get a copy by email within 2 minutes.
- 3
Open your phone's eSIM settings
iPhone: Settings, then Mobile Data, then Add eSIM, then Scan QR. Android: Settings, then Network, then Add Mobile Plan or SIM, then Scan QR.
- 4
Land in Vietnam and turn on data roaming
Turn on data roaming for the new eSIM line (this is local data, not international roaming. The toggle is just how the OS routes traffic). You'll be online within 60 seconds of arrival.
Vietnam eSIM frequently asked questions
Will the eSIM work on Ha Long Bay cruises?
Mostly yes. Viettel has the strongest coverage in the Ha Long Bay area. Most of the popular cruise routes stay within signal range. Deeper into Lan Ha Bay you'll see weaker signal or short dropouts.
Does it cover Sapa and the mountain trekking routes?
Sapa town itself has solid 4G. The trekking routes drop into intermittent signal once you're a few kilometres out, but most homestays in the surrounding villages have working signal because Viettel has prioritised the area for tourism.
How much data do I need for a 14-day Vietnam trip?
5GB to 10GB. Vietnamese tourists move around a lot (Hanoi to Ha Long to Hoi An to HCMC is a common 2-week loop), and each transit segment burns Maps data. If you're uploading travel content daily, go 10GB or higher.
Will it work in the Mekong Delta?
Yes. Coverage in Can Tho and the bigger Mekong towns is reliable on 4G. The smaller river villages and the floating markets have weaker signal but it stays usable.
Can I use it on the Reunification Express train?
Yes for most of the route. The Hanoi to HCMC train spends 30+ hours covering the country and signal is continuous in the populated coastal stretch. Some inland mountain sections drop signal briefly.
Does the plan include voice calls?
No, data only. Zalo is the dominant local messaging app in Vietnam, more popular than WhatsApp for local business. Tour operators and homestays often communicate via Zalo.
More Asia destinations
Ready to travel Vietnam with mobile data?
QR code in 90 seconds. No app. No carrier shop.
Last updated 23 May 2026. Operated by Vektor Utility Holdings Limited (UK company 17174994).