Best eSIM for Vietnam

For most travelers, Airalo is the best all-round eSIM for Vietnam, because it runs on Viettel, the network with by far the strongest nationwide and rural coverage, which matters the moment you leave the cities for Ha Long Bay, Sa Pa, or the Ha Giang Loop. Budget travelers get the lowest per-GB cost with Nomad, and anyone who wants unlimited data for streaming or sharing a hotspot should look at Holafly. Prefer one of the two big city carriers? Airalo's Viettel-based plan still wins for trips that mix Hanoi or Ho Chi Minh City with the mountains and islands. Not sure how much data you need? Try the eSIM Finder.

Quick Pick: the Best eSIM for Vietnam

Airalo (Vietnam 5 GB / 30 days): Runs on Viettel, the only network with reliable coverage in rural Vietnam and the mountains, with full hotspot support and easy in-app top-ups for longer trips.

Vietnam eSIM Plans Compared

Indicative pricing. Tap through for live rates.

Airalo Vietnam Plans

Airalo's Vietnam eSIM, sold as the Xin Chao plan, connects through Viettel, the country's dominant carrier and the only network with coverage you can trust outside the cities. That makes Airalo the smartest default for a typical Vietnam trip that mixes Hanoi or Ho Chi Minh City with Ha Long Bay, Sa Pa, or the Mekong Delta, because the same eSIM keeps working as you move from urban centers into rural and mountain regions where Mobifone and Vinaphone fade out.

The 1GB plan is ideal for a short city break where you mostly rely on hotel and cafe WiFi and just need data for Grab and navigation between stops. For a longer two-week loop of the country, the 5GB or 10GB plan gives comfortable headroom, and in-app top-ups mean you are never stranded if you run low mid-trip. Full hotspot support is genuinely useful here for sharing a connection on a cruise or with a riding group.

Holafly Vietnam Plans

Holafly connects to Viettel and Vinaphone in Vietnam, so it pairs unlimited data with the strongest coverage in the country. That combination is hard to beat if you are a heavy user: stream on long sleeper-bus and train rides, run Google Translate camera mode on menus and signs all day, and upload photos and clips from Ha Long Bay or Sa Pa without ever watching a data counter.

Unlimited also makes Holafly the natural pick when you plan to share a hotspot, for example with a motorbike group on the Ha Giang Loop or with travel companions on a cruise. Plans run from 1 to 90 days, so it works equally well for a short city trip or an extended stay. Note that an operator fair-usage policy can slow speeds after very heavy monthly use, which is standard across unlimited eSIMs.

Nomad Vietnam Plans

Nomad offers the lowest per-GB prices for Vietnam, with rates starting around $1.50 per GB and a 5GB / 30-day plan in the $10 range that undercuts Airalo by a few dollars. If you have a good estimate of your data needs and your trip stays mostly in the cities and along the well-traveled coast, Nomad gives you the most data for your money.

The trade-off is the network. Nomad's Vietnam plans run on Mobifone and Vinaphone, which are strong in Hanoi, Ho Chi Minh City, Da Nang, and the resort islands but thin out faster than Viettel in the northern mountains and remote rural areas. For a city-and-beach itinerary that is rarely a problem, and being able to switch between two networks helps in built-up areas. For a Ha Giang Loop or deep Sa Pa trek, a Viettel-based plan is the safer call.

Mobile Networks in Vietnam

Vietnam has three major mobile networks, and which one your eSIM uses matters far more here than in most countries because coverage drops off sharply once you leave the cities for the northern mountains, the Ha Giang Loop, or the smaller islands.

Viettel is by far the largest carrier, with more than half the market and the widest, most reliable coverage nationwide. It is the only network that consistently reaches rural areas such as the Sa Pa and Ha Giang valleys, the Mekong Delta backroads, and remote stretches of the central coast, which is why it is the safest choice for any trip that goes beyond the big cities. Airalo and Holafly both run on Viettel. Vinaphone (the VNPT network) is the second-largest carrier, with strong coverage in Hanoi and Ho Chi Minh City and good reach across resort areas and popular islands like Phu Quoc, Cat Ba, and Con Dao. Mobifone is competitive in the cities but its rural coverage is noticeably weaker, so it is not the network to rely on for mountain or off-the-beaten-path travel. Nomad's Vietnam plans use Mobifone and Vinaphone.

Coverage Across Vietnam

Coverage where travelers actually go:

How to Choose the Right Plan

Start with where you are going. If your trip stays beyond the big cities at all, on the Ha Giang Loop, in Sa Pa, or out in the Mekong Delta, pick a Viettel-based plan, which means Airalo for metered data or Holafly if you want unlimited. For a city-and-beach itinerary on a tight budget, Nomad on Mobifone and Vinaphone is the cheapest per gigabyte and perfectly adequate. Then size your data: 5 to 10 GB covers most two-week trips, while heavy streamers and hotspot sharers are better off on Holafly's unlimited plan. When in doubt, the Viettel coverage advantage is worth the small price premium.

Frequently Asked Questions

Will my eSIM work on a Ha Long Bay overnight cruise?

Mostly, yes. Near Ha Long city and Cat Ba you will have a usable signal, and the sundeck of the boat is the best spot to pick up 4G as it sits highest with the clearest line of sight. As the cruise sails deeper among the karst islets the signal weakens, since Vietnamese carriers use ground transmission rather than satellite. A Viettel-based plan such as Airalo's gives you the best chance of staying connected, and most cruises offer onboard WiFi in the restaurant as a backup.

Can I stay connected while trekking around Sa Pa or the Ha Giang Loop?

Partly. Viettel covers Sa Pa town, Ha Giang city, and the district towns reasonably well, so an Airalo or Holafly plan keeps you online between stops. The mountain roads and trekking trails in between, including the Ma Pi Leng Pass on the Ha Giang Loop, are largely dead zones on every network. Download offline maps before you set off and do not count on data in the high passes.

Which eSIM is best for a Vietnam motorbike trip?

Choose a Viettel-based plan, which means Airalo or Holafly. Viettel is the only network with coverage worth relying on across rural Vietnam, the central coast, and the northern mountains where most motorbike routes go. Mobifone and Vinaphone thin out quickly once you leave the cities, so they are a poor fit for long overland rides.

Is an eSIM better than buying a SIM at the airport in Vietnam?

For most travelers, yes. SIM counters at Noi Bai (HAN), Tan Son Nhat (SGN), and Da Nang (DAD) charge tourist prices, take your passport, and often mean a queue after a long flight. With an eSIM you install it before you fly and connect the moment you land, with no paperwork and a price you locked in at home.

How much data do I need for two weeks in Vietnam?

Most travelers use around 5 to 10 GB over two weeks in Vietnam for maps, messaging, ride-hailing apps like Grab, and social media. If you stream video, make frequent video calls, or share a hotspot from a motorbike or cruise, plan for 20 GB or an unlimited Holafly plan instead.

Can I use one eSIM for Vietnam and other Southeast Asia countries?

Yes. Airalo and Holafly both sell regional Asia plans that cover Vietnam alongside neighbors like Thailand, Cambodia, and Laos on a single eSIM, which is ideal for a multi-country Southeast Asia trip. For a Vietnam-only itinerary, a local plan is usually cheaper per gigabyte.