SIM Card Vietnam 2026: What Tourists Must Know Before They Fly

Vietnam tightened its SIM rules in 2026. A local SIM is still cheap, but you now have to register it in person with your passport, and pre-activated SIMs from airport stalls can get blocked within hours. This guide covers what to know before you fly: networks, prices, where to buy, and easier alternatives.

Rather skip the counter? A travel eSIM for Vietnam needs no registration and is ready before you fly.

The short version

Can tourists buy a SIM card in Vietnam?

Yes. You can buy a prepaid SIM from Viettel, Vinaphone or MobiFone with your passport. The SIM must be registered in your own name, at the shop.

Passport registration: how it works

Bring your real passport. A copy or a photo of it won't work. The staff scan your passport, take a photo of your face and register the SIM in your name. This is normal in Vietnam, not a scam.

Don't want to queue after a long flight? With a Vietnam eSIM, you don't need to register anything.

Vietnam's 2026 SIM crackdown: what changed

In 2026, Vietnam got much stricter with SIM cards:

• From 15 April 2026: you need a face check when you buy a new SIM, or when you put a SIM into a different phone.
• From 15 June 2026: SIMs without a face check could no longer make calls or send texts. Viettel alone blocked over 5 million.

This matters if you buy a pre-activated SIM, a SIM that's already registered in someone else's name. Once you put it into your phone, calls and texts can be blocked within two hours, until that person does a face check.

How do you know it's pre-activated? The seller doesn't ask for your passport, and the SIM works right away.

Picture this: you buy a cheap SIM at a stall, no passport needed, and it works. A couple of hours later, you can't call your Grab driver or your hotel.

What this means for you: a SIM registered to your own passport at an official shop is safe. A pre-activated SIM can be blocked during your trip.

Want to avoid all of this? A travel eSIM for Vietnam is data-only and ready before you fly.

Warning: avoid pre-activated SIMs at the airport

Some airport stalls and street sellers sell pre-activated SIMs. They're quick: no passport, no form, and the SIM works in a minute. That's exactly the problem.

Since the 2026 rules, these SIMs can get blocked: calls and texts can stop within two hours of putting one in your phone.

Before you pay, check these three things:

• The seller asks for your passport.
• They take a photo of your face.
• You're at an official Viettel, Vinaphone or MobiFone counter or store.

If any of these is missing, walk away.

Landing late and don't want the hassle? A Vietnam eSIM is ready before you fly, no counter needed.

Best SIM card in Vietnam: Viettel vs. Vinaphone vs. MobiFone

Vietnam has three main networks: Viettel, Vinaphone and MobiFone. All three have 5G, which now reaches about 90% of people in Vietnam.

Not sure which one to pick? Viettel is the easy choice: it had the fastest 5G in the latest official speed test.

Viettel

In the official speed test from January 2026, Viettel had the fastest 5G, at about 617 Mbps.

Vinaphone

Run by VNPT, a state-owned group. It launched 5G in late 2024, together with Viettel, and came second in the January 2026 5G speed test.

MobiFone

The third big network. It added 5G in April 2025 and came third in the January 2026 5G speed test.

Coverage and speeds by network

The average mobile speed in Vietnam was about 90 Mbps in January 2026. To use 5G, your phone needs to support it.

Tourist SIM card prices in Vietnam

A SIM with a prepaid data package costs about $6.50–15, depending on how long you stay and how much data you need. Prices can change, so check at the counter.

Tourist SIM vs. prepaid SIM

• Tourist SIM: a ready-made package for travelers, with data for a set number of days. Easy to buy at the airport.
• Prepaid SIM: a normal local SIM. You pick a monthly data plan and top up when you need more.

SIM options for long stays and digital nomads

Staying a month or longer? A local prepaid SIM with a monthly data plan lets you renew every 30 days.

One tip: keep the SIM in the same phone. Moving it to a different phone means another face check.

Where to buy a SIM card in Vietnam

You can get a SIM at the airport when you land, or at a carrier store in the city. Either way, bring your passport.

At the airport

The international airports in Ho Chi Minh City, Hanoi, Da Nang, Cam Ranh and Phu Quoc have SIM stalls just after baggage claim. The staff speak English and help you activate the SIM.

Before you leave the counter, check that the SIM works.

Long queue after a long flight? A Vietnam eSIM is already on your phone when you land.

In the city

Go to an official Viettel, Vinaphone or MobiFone store. The staff register the SIM to your passport on the spot.

Skip street sellers who don't ask for your passport. That's a pre-activated SIM.

How to activate and top up your SIM

Activation steps

1. Hand over your passport at an official counter or store.
2. The staff register the SIM to your name and take a photo of you.
3. Put the SIM in your phone and turn on mobile data.
4. Test it before you leave: open a website and make a short call.

Topping up and checking your balance

When you buy your SIM, ask the store staff to show you how to check your balance and top up.

Common SIM problems and quick fixes

• "SIM not supported": your phone is locked to your home carrier. Ask your carrier to unlock it before you travel.
• Calls and texts stopped after switching phones: the SIM needs a new face check. Go to a store of your carrier with your passport.
• Data stopped working: your plan may be used up. Top up at a carrier store.

Rather skip the counter? A Vietnam eSIM is set up from your phone before you fly.

Local SIM vs. eSIM vs. roaming

A local SIM isn't your only option. Here's how the three compare:

Careful with roaming: unless your plan includes Vietnam, roaming charges can be much higher than at home. Apps also use data in the background, even when you're not using them. Check your carrier's rates before you go.

Need a local number for calls? Get a local SIM. Just need data? A travel eSIM skips the counter and the passport check. It needs a phone that supports eSIM.

Get your Vietnam eSIM →

FAQ

Which SIM card is best for tourists in Vietnam? It depends on what you need. For data only, a travel eSIM is the easiest: no counter visit, and it runs on Viettel and Vinaphone. If you need a local number, Viettel is the easy pick: it had the fastest 5G in Vietnam's official speed test from January 2026.

How much does a SIM card cost in Vietnam? About $6.50–15 for a SIM with a prepaid data package, depending on how long you stay and how much data you need. Prefer to skip the counter? A travel eSIM is ready before you fly.

Can a tourist buy a Viettel SIM card? Yes. Bring your original passport to a Viettel store or airport counter. Want Viettel's network without the counter? The Avelis eSIM for Vietnam runs on Viettel and Vinaphone.

Do I need my passport to buy a SIM card in Vietnam? Yes, the original. The staff scan it and take a photo of your face to register the SIM in your name. A travel eSIM skips the counter visit.

Is it safe to buy a SIM card at the airport in Vietnam? Yes, at an official counter that registers the SIM to your passport. Skip stalls that sell SIMs without a passport check: those are pre-activated SIMs and can get blocked within hours. Or skip the airport counter entirely with an eSIM you set up before you fly.

Does a Vietnam tourist SIM come with a local phone number? Yes, a local SIM comes with a Vietnamese number. A travel eSIM is data only, but you can still call and message through apps like WhatsApp.

How long does a tourist SIM last, and what happens if I don't top up? It depends on the package. Ask at the counter how long yours lasts and whether you can top it up. Avelis eSIM plans for Vietnam run for 7, 15, 30 or 180 days.

Can I use my SIM card in every city in Vietnam? Yes. Viettel, Vinaphone and MobiFone work across the whole country. In remote areas, the signal can be slower.

Are Vietnamese SIM cards 5G-ready? Yes. All three networks have 5G, and the Avelis eSIM for Vietnam supports speeds up to 5G too. Your phone needs to support 5G to use it.

Can I get a Vietnam SIM card before I arrive? Not a local one. A local SIM has to be registered in person in Vietnam, with your passport. A travel eSIM is the only option you can fully set up before you fly.

Checklist before you fly

• Check that your phone is unlocked. If you're not sure, ask your carrier.

• Decide whether you need a local number or just data.

• Local SIM

  • Bring your original passport, not a copy.
  • Buy at an official airport counter or a carrier store in the city.
  • Don't buy a SIM that's sold without a passport check.
  • Keep the SIM in the same phone once it's working.

• Travel eSIM

  • Check that your phone supports eSIM.
  • Install it at home before you leave for the airport.

• Roaming

  • Check your carrier's rates, or turn off data roaming to avoid extra charges.

Sources

• Biometric verification required for mobile device changes from April 15 — Báo Tây Ninh
• Unverified mobile subscriptions hit by service suspension from June 15 — Vietnam News Agency
• In Vietnam, mobile users have to provide a portrait picture to legally own a SIM — Tuổi Trẻ News
• Vietnam's internet speeds surge at start of 2026 — Ministry of Science and Technology
• Vietnam accelerates 6G plans as 5G reaches 90% population coverage — Developing Telecoms
• Sim card Vietnam costs: Where to buy, which carriers to choose — VnExpress International
• Roaming outside the EU and EEA — ComReg