Vietnam is one of Southeast Asia's top destinations, and staying connected will change your trip: maps for Hanoi's motorbike chaos, a translator in the markets, and data for booking on the fly. A Vietnam eSIM gives you internet as soon as you land, without having to find a store or pay your carrier's exorbitant roaming fees. Here you'll find coverage, local operators, GB, and activation in 1 minute.
Does an eSIM work in Vietnam?
Yes. An eSIM works in Vietnam if your phone is compatible: it connects to local networks like a physical SIM, but without a card or paperwork. You install it before leaving home, land in Hanoi or Ho Chi Minh, and have data in 1 minute, without visiting any store.
It's the perfect option for backpackers and travelers who move around a lot, because you don't depend on finding a place to buy a SIM or having it registered with your passport. Before buying, check that your phone supports eSIM by reviewing the guide on how to know if your phone is compatible. Almost all recent models are.
In Vietnam, cheap physical SIMs are sold on every corner, but they involve haggling, changing your usual card, and sometimes document registration. With an eSIM, you save all that: you arrive at Noi Bai Airport (Hanoi) or Tan Son Nhat (Ho Chi Minh) already connected, order your Grab to the hotel, and start your trip without friction.
Operators and coverage: Viettel and company
Travel eSIMs rely on existing Vietnamese operators. The largest and with the best coverage is Viettel, followed by Vinaphone and Mobifone. Viettel reaches more rural and mountainous areas, so it's the one you want if you're venturing out of the cities.
4G coverage is very good in Hanoi, Ho Chi Minh, Da Nang, Hoi An, and all along the coast. In Sapa, the northern mountains, and the Mekong Delta areas, the signal drops but remains in tourist towns. In Ha Long Bay, you'll have coverage from the coast, although during a cruise among the islets, it might be intermittent. An eSIM that connects to the best available network gives you the maximum possible coverage in each area. If your route starts in the capital, check out the eSIM for Hanoi guide.
How many GB you need for Vietnam
For a typical trip with maps, messaging, social media, and photos, estimate between 1 and 2 GB per week. Vietnam is a destination where you'll use a translator and book transportation and accommodation on the fly a lot, so if you're tight on data, aim for the higher end.
| Duration | Light usage | Medium usage | Heavy usage |
|---|---|---|---|
| 1 week | 2 GB | 3 GB | 5 GB |
| 2 weeks | 3 GB | 5 GB | 10 GB |
| 1 month | 5 GB | 10 GB | 20 GB |
A tip: in Vietnam, hotel and cafe Wi-Fi is abundant and decent, so you can rely on it for uploading photos and making video calls, and save your eSIM data for when you're out and about. If your trip lasts two weeks, the eSIM for Vietnam in 2 weeks guide details GB per itinerary.
Hanoi, Ho Chi Minh and the north-south route
The most common itinerary covers the country from north to south (or vice versa): Hanoi, Ha Long Bay, Hoi An and Da Nang in the center, and Ho Chi Minh with the Mekong Delta in the south. With an eSIM, you stay connected throughout the journey, even on overnight trains and long-distance buses.
Traveler's tip: In Vietnam, you'll use Grab (the Asian equivalent of Uber) a lot to get around and order food. It needs active data to work, so having stable internet on your phone saves you from haggling and waiting.
For the southern part of the country, you can find local info in the eSIM for Ho Chi Minh guide. And if you're looking for the best data option compared, check out our selection of the best eSIM for Vietnam.
On long train or bus journeys, having data saves you from boredom and keeps you oriented: you can follow the route on the map, notify your accommodation of your arrival time, and download tickets or passes on the go. Mobile coverage generally follows the coastline quite well, so you'll be connected for most of the trip.
Vietnam plus Cambodia or Thailand
Many travelers combine Vietnam with its neighbors on a single Southeast Asia itinerary. If your route crosses into Cambodia or Thailand, you might consider a regional eSIM that covers several countries instead of buying one for each border.
This way, you avoid managing three different plans and maintain your connection when changing countries. You'll find all the information in the general guide to eSIM for Southeast Asia and, if your route includes Thailand and Vietnam, in the comparison of the best eSIM for Thailand and Vietnam. For Cambodia only, see the eSIM for Cambodia.
How to activate your eSIM step by step
The convenient way is to install the eSIM with Wi-Fi at home and activate data upon landing in Vietnam. This way, you arrive connected without depending on airport Wi-Fi.
- Purchase the eSIM for Vietnam and receive the QR code instantly via email.
- With Wi-Fi, go to Settings > Mobile Data > Add eSIM and scan the QR.
- Label the eSIM ("Vietnam") so as not to confuse it with your main line.
- Upon landing, activate the eSIM data and deactivate roaming for your main line.
- Check the connection; if anything fails, review the installation guide.
If it's your first eSIM, the step-by-step guide on how to install an eSIM will clarify it in minutes. Our eSIM for Vietnam includes 24/7 Spanish support in case any questions arise during your trip.
Frequently asked questions
Which operator is best in Vietnam?
Viettel is the operator with the widest coverage in the country, especially in rural and mountainous areas like Sapa or the Mekong Delta. Vinaphone and Mobifone also work well in cities. A travel eSIM connects to the best available network at each point.
Is there free roaming in Vietnam with my plan?
No. Vietnam is outside the European roaming zone, so your Spanish plan does not include free data there. Your operator would charge you international roaming at €10-20 per day, much more expensive than a local eSIM with a fixed price.
How many GB do I need for two weeks in Vietnam?
For a two-week tourist trip, about 5 GB is usually sufficient if you take advantage of hotel and cafe Wi-Fi, which is abundant in Vietnam. If you use Grab, translator, and social media a lot, estimate about 10 GB to be safe.
Does the eSIM work in Ha Long Bay?
Yes, from the coast and ports, with good 4G coverage. During the cruise through the islets, the signal may be intermittent due to the distance to the antennas. This is normal with any operator; take advantage of it to disconnect between karsts.
Can I use Grab and order food with the eSIM?
Yes. Grab, Google Maps, WhatsApp, and all your apps work with eSIM data just like at home. In fact, having stable data is key in Vietnam for getting around with Grab and avoiding haggling over taxi prices on the street.
Conclusion
Vietnam is much more enjoyable when you're connected, and since it's outside the EU, roaming costs skyrocket. With an eSIM, you get data at a fixed price, Viettel and other providers' coverage, and activation in 1 minute, with no registrations or bill surprises. Buy your eSIM for Vietnam before you fly and land in Hanoi already connected.
