Vietnam eSIM or SIM card? How to get online, and why you'll want Zalo

Staying connected in Vietnam is easy and cheap. Signal is strong in every city, Wi-Fi is everywhere, and a month of data costs less than a coffee at home. The real question isn't whether you'll get online, it's how: a travel eSIM you set up before you fly, or a local SIM with a Vietnamese number. For most visitors the answer comes down to one app you've probably never heard of. This guide covers both options, what they cost in 2026, a new rule worth knowing about, and the apps that make the trip run smoothly, including the one your pickleball club will use to tell you where tomorrow's game is.

eSIM or local SIM: which one?

Both work well. They suit different trips.

A travel eSIM is a digital SIM you buy online from a company like Airalo, Holafly, Saily or a Vietnamese reseller. You scan a QR code at home, and it connects to a local network the moment you land. No queue, no counter, no swapping tiny cards in a taxi. You keep your home SIM active for bank codes and calls from family. The catch is that most travel eSIMs are data only, with no Vietnamese phone number.

A local tourist SIM is a physical card from one of the three big networks. It's cheaper for the data you get, and it comes with a +84 Vietnamese number, which matters more here than in most countries. You'll need your passport to buy one, and your phone must be unlocked.

Our honest take: if your trip is short and fully arranged, an eSIM is the least hassle. If you're staying two weeks or more, travelling solo, or planning to find your own games, get a local SIM too. Many phones now hold an eSIM and a physical SIM at once, so you can have both.

Buying a tourist SIM at the airport

Noi Bai in Hanoi, Tan Son Nhat in Saigon and Da Nang airport all have Viettel, Vinaphone and Mobifone counters in the arrivals hall, side by side, with packages printed on boards. Most take cards.

• Bring your passport. Every SIM in Vietnam is registered to a named person, and the staff will photograph your passport.
• Let them fit it. They'll insert the SIM, set up the data and check it works before you walk away. Do the same check yourself: open a map before you leave the counter.
• Airport prices are a little higher than in town, by a dollar or two. After a long flight, it isn't worth chasing.
• Ask for a data plan with some call minutes if you'll be ringing drivers or hotels.

Phone shops in every city sell the same SIMs if you'd rather sort it later, and your hotel can point you to the nearest official store.

What it costs in 2026

Prices move a little between counters and months, but this is the shape of it (around 26,000 VND to the US dollar):

• Local tourist SIM, 30 days: about 100,000 to 250,000 VND (US$4 to US$10). Typical packages give 2GB a day or a large monthly allowance, often with some call minutes and hotspot allowed.
• Short data-only SIM: some networks sell a week of data for very little, handy for a quick visit.
• Travel eSIM: roughly US$5 to US$25, depending on how many gigabytes and days you buy. "Unlimited" plans cost more and usually slow down after a daily cap.

Either way, data is not where your budget goes. Our money in Vietnam guide covers cards, cash and tipping.

Which network has the best coverage?

• Viettel has the widest network and the best reach in mountains and rural areas. If you're heading to Ha Giang, Sapa, Phong Nha or long drives through the Mekong, it's the safe choice.
• Vinaphone and Mobifone are fast in the cities and the main tourist areas, and they're what many travel eSIMs connect to.
• 5G is live in the big cities on all three, though 4G is more than enough for maps, messages and video calls home.

On a Ha Long Bay cruise you'll lose signal in places between the islands. Most boats have Wi-Fi, and our Ha Long Bay cruise guide covers what else to expect on board.

The 2026 rule about swapping phones

Vietnam has tightened SIM registration over the last two years. Since 15 April 2026, a circular from the Ministry of Science and Technology requires a face re-verification when a SIM is moved to a different phone. If that check isn't done, the network can cut outgoing calls and texts within hours, and later suspend the line.

For a visitor, the practical advice is simple: buy the SIM, let the shop put it in the phone you'll use for the whole trip, and leave it there. Don't move it into a spare handset or a partner's phone halfway through. If something does go wrong, any official Viettel, Vinaphone or Mobifone store can sort it out with your passport. This rule doesn't touch travel eSIMs bought from overseas companies.

Why you'll want a local number: Zalo

Zalo is Vietnam's own messaging app, and almost everyone here uses it. WhatsApp works for international companies and other travellers, but the people you'll deal with day to day mostly don't use it:

• Private drivers, homestay owners and small hotels confirm pick-ups on Zalo.
• Restaurants, tailors and spas take bookings there.
• Local clubs, including pickleball clubs, run their open-play groups on Zalo.

Zalo verifies new accounts by text message. You can sign up with a foreign number, but it's smoother with a Vietnamese one, or set it up at home before you fly while your home SIM is active. Adding someone is easy: they show you their Zalo QR code and you scan it. The app has an English interface, and the built-in translation is good enough for "Where are you?" and "See you at 5pm".

On a short, fully arranged trip you can skip it. Your guide and our team will use WhatsApp with you. If you're travelling independently for a while, install it.

Apps worth installing before you land

• Grab: cars, motorbike taxis and food delivery, with the price fixed before you ride. Add a card before you fly.
• Xanh SM and Be: local alternatives to Grab. Xanh SM's green electric taxis are everywhere in the big cities and a useful backup when Grab prices surge.
• Google Maps: download offline maps for each city you'll visit.
• Google Translate: download the Vietnamese pack for offline use. The camera mode reads menus and signs.
• Zalo and WhatsApp: one for locals, one for home.
• Your bank's app: check it works abroad and that you can receive security codes. A data-only eSIM plus your home SIM switched on for texts solves this.

A good VPN is worth having for hotel and café Wi-Fi, especially for banking. Set it up before you leave.

Wi-Fi and staying charged

Free Wi-Fi is standard in hotels, cafés and most restaurants, and it's usually quick. The password is on the wall, the menu or the receipt. Use your data for anything private.

Maps, translation and ride-hailing drain a battery fast in the heat, so carry a power bank. On domestic flights in Vietnam they go in your cabin bag only, and you can't use them on board. Our Vietnam packing list has the details, plus the plug adapter you'll need.

Getting online for the courts

This is where a local number pays for itself. Pickleball is booming in Vietnam, and almost all of it is organised by message. Clubs post their drop-in and social sessions in Zalo and Facebook groups, usually the day before. Courts are booked by sending a message, not through an app. Most social play happens in the late afternoon and evening, after work, so a message at lunchtime is how you find that evening's game.

• Join the club's Zalo group when you play somewhere you like. You'll see the next sessions as they're posted.
• Search Facebook for "Pickleball Hanoi", "Pickleball Da Nang" or "Pickleball Saigon" for open sessions.
• Our city guides list clubs that welcome visitors: Hanoi, Da Nang and Saigon.

On our private trips we book courts and line up local players for you, so you don't need to do any of this. But if you like to wander into a game on a free evening, a Vietnamese number and Zalo are the keys.

Vietnam eSIM and SIM FAQ

Is an eSIM or a SIM card better for Vietnam?

An eSIM is easier because you set it up before you fly. A local SIM is cheaper and gives you a Vietnamese number, which helps with Zalo, drivers and local bookings. On a longer trip, many people use both.

How much is a tourist SIM in Vietnam?

About 100,000 to 250,000 VND (US$4 to US$10) for 30 days with plenty of data, a little more at the airport than in town.

Do I need my passport to buy a SIM in Vietnam?

Yes. Every SIM is registered to a named person, and the shop will photograph your passport.

Does a travel eSIM give me a Vietnamese phone number?

Most don't. They're data only. If you need a +84 number for Zalo or local calls, buy a physical tourist SIM.

Which network is best in Vietnam?

Viettel has the widest coverage, especially in the mountains and countryside. Vinaphone and Mobifone are fast in the cities and tourist areas.

Do I need Zalo in Vietnam?

Not on a short, fully arranged trip. If you're travelling independently, booking drivers or joining local pickleball sessions, it makes life much easier.

The bottom line

For most visitors, the best way to get online in Vietnam is a travel eSIM installed before you fly, with a cheap local tourist SIM added if you want a Vietnamese number for Zalo, drivers and local games. Bring your passport, buy from an official counter, keep the SIM in one phone, and download Grab, Google Maps and Translate before you land. If you'd rather not think about any of it, we can plan a private trip where the courts, cars and contacts are already arranged.