Activating Your Vietnam SIM Card: A Step-by-Step Guide

Getting Online the moment you land in Vietnam used to be simple — grab a SIM from any shop, pop it in, done. In 2026, that still works, but there’s one step that catches travelers off guard: mandatory biometric registration. Skip it, or buy from the wrong vendor, and your SIM goes dark within days. This guide walks you through exactly what to expect, carrier by carrier, step by step, so you land connected and stay that way.

Why SIM Activation Got Stricter in 2026

The biggest shift in Vietnam’s SIM landscape happened in late 2023 and was fully enforced through 2024. Since then, every SIM card purchased in Vietnam — physical or eSIM — must be registered to a real identity with biometric verification. That means your face, your passport, and a scan of both on the spot.

This is not optional. It is a legal requirement applied by all three major carriers and enforced by the Ministry of Information and Communications. Unregistered SIMs, or SIMs registered with fake or incomplete data, are flagged and deactivated. This is why buying a SIM from a random street vendor or a small convenience store is now genuinely risky — those sellers often cannot complete the biometric process properly, and you have no way of knowing until your data cuts out on day three.

The practical result: stick to airports, official carrier stores, or trusted international eSIM providers. The process at those locations takes two to five minutes and runs smoothly. Everywhere else is a gamble.

Choosing the Right Carrier: Viettel, Mobifone, or Vinaphone

Vietnam has three main mobile network operators, and all three offer solid 4G LTE nationwide with 5G expanding fast in Hanoi, Ho Chi Minh City, Da Nang, and Phu Quoc. Your choice comes down to route and price rather than dramatic quality differences.

Viettel

Viettel is Vietnam’s largest carrier and the one to choose if you’re heading off the beaten track — northern mountain provinces, the Central Highlands, or rural coastal stretches. Its coverage in areas like Ha Giang and Moc Chau is noticeably stronger than competitors. Tourist packages include a 15-day plan (approximately 200,000 VND / ~$8 USD) with 60GB of high-speed data at 2GB per day, then unlimited at reduced speed, plus 50 local call minutes and 50 SMS. The 30-day plan runs around 300,000 VND (~$12 USD) for 120GB at 4GB per day. Manage your plan via the MyViettel app on iOS or Android, or visit viettel.vn. Dial *102# to check your balance directly.

Mobifone

Mobifone has strong urban and suburban coverage and competitive data pricing. Their 10-day tourist plan costs approximately 150,000 VND (~$6 USD) for 30GB at 3GB per day. The 30-day plan is around 250,000 VND (~$10 USD) for 90GB at 3GB per day with 50 call minutes. Use the MyMobiFone app or visit mobifone.vn. Dial *101# to check your balance.

Vinaphone

Vinaphone, part of the VNPT group, is reliable and slightly better value for mid-length stays. Their 15-day plan is around 180,000 VND (~$7.20 USD) for 45GB, and the 30-day plan costs approximately 280,000 VND (~$11.20 USD) for 90GB plus 50 call minutes. Manage through the MyVNPT app or at vinaphone.com.vn. Balance check: dial *101#.

For most travelers doing the standard south-to-north or north-to-south route, Viettel is the safe default. If you’re staying mostly in cities, Mobifone’s pricing is slightly more competitive at the 10-day tier.

Step-by-Step: Buying and Activating a Physical SIM Card

The process is the same across all three carriers. Here’s exactly what happens:

1. Arrive at the counter. At major international airports — Noi Bai (HAN) in Hanoi, Tan Son Nhat (SGN) in Ho Chi Minh City, Da Nang (DAD), and Phu Quoc — look for carrier kiosks immediately after you clear customs in the arrivals hall. You’ll hear the hum of other travelers doing the same thing; it’s usually the first queue people join after baggage claim.
2. Hand over your original passport. Photocopies are not accepted. The vendor scans your passport and takes a digital photo of your face for biometric verification. This typically takes two to five minutes.
3. Choose your package. Tell the vendor how many days you need and whether calls matter. Most people opt for data-heavy packages. The vendor will show you the options on a laminated card or phone screen.
4. Pay. Cash in VND is the easiest option. Larger airport kiosks and official stores may accept credit cards, but don’t assume — bring some cash.
5. Watch the vendor set it up. They’ll insert the SIM, configure settings if needed, and run a quick test — usually loading a page or making a call. Within one to two minutes, you’ll receive an SMS confirming your package is active.
6. Confirm data is working before you walk away. Open Google Maps or any page. If it loads, you’re good. If not, flag the vendor immediately rather than figuring it out later at the taxi rank.

eSIM Setup: The QR Code Process Explained

eSIMs have become the preferred option for travelers who want to keep their home SIM active for calls and texts while using a Vietnamese number for data. Your phone must be eSIM-compatible (most newer iPhones, Google Pixel devices, and some Samsung Galaxy models) and unlocked.

You have two routes: buy directly from Viettel, Mobifone, or Vinaphone at their stores, or purchase from international providers like Airalo, Holafly, or Nomad online before you fly. Third-party providers are typically data-only but offer the advantage of activating before you land.

Activation steps:

1. Purchase your eSIM online or in-store. You receive a QR code by email or printed receipt.
2. On iPhone: go to Settings > Mobile Data > Add Data Plan and scan the QR code.
3. On Android: go to Settings > Network & Internet > SIMs > Add more and scan the QR code.
4. Label the eSIM when prompted (e.g., “Vietnam Data”) and set it as your active data line.
5. The eSIM activates automatically. If purchased from a local carrier store, biometric registration still applies — the vendor handles it in-store before issuing the QR code.

One thing travelers miss: if you buy an eSIM from a Vietnamese carrier in-store, you still need your passport for biometric registration. The digital format of the SIM doesn’t change that legal requirement.

2026 Budget Reality: What You’ll Actually Pay

SIM cards in Vietnam remain genuinely cheap by global standards. Here’s what the three tiers look like in 2026:

• Budget (10 days): Mobifone Tourist Data 10-Day — approximately 150,000 VND (~$6 USD). 30GB high-speed data, then unlimited at reduced speed. Enough for maps, messaging, and social media for a short city trip.
• Mid-range (15 days): Viettel Travel SIM 15-Day — approximately 200,000 VND (~$8 USD) or Vinaphone Happy Tourist SIM 15-Day — approximately 180,000 VND (~$7.20 USD). Both give 45–60GB of high-speed data, suitable for a two-week itinerary.
• Comfortable (30 days): Viettel Travel SIM 30-Day — approximately 300,000 VND (~$12 USD) for 120GB. Mobifone Tourist Max 30-Day at 250,000 VND (~$10 USD) or Vinaphone Super Tourist SIM 30-Day at 280,000 VND (~$11.20 USD) for 90GB each. All include at least 50 local call minutes.

Prices have remained relatively stable since 2024, with carriers absorbing cost increases by adding more data rather than raising prices. The exchange rate used here is approximately 25,000 VND to 1 USD.

Topping Up, Checking Data, and Managing Your Plan

Running out of data mid-trip is avoidable. Here’s how to stay on top of it:

• Check your balance: Dial *102# for Viettel or *101# for Mobifone and Vinaphone. A text message with your remaining data and credit appears within seconds.
• Top up at stores: Carrier stores, FPT Shop locations, and The Gioi Di Dong electronics shops all sell top-up credit. Look for the phrases “thẻ cào” (scratch card) or “nạp tiền” (top up) on signs.
• Top up via app: The MyViettel, MyMobiFone, and MyVNPT apps allow you to top up using a card. Support for international credit cards varies — it works for some users and not others, so treat it as a bonus rather than a guarantee.
• Convenience stores: Circle K and similar chains often sell scratch cards, though staff availability and language can vary.

If you’re planning a longer stay or know you’ll burn through data quickly (video calls, uploading photos daily), buy the 30-day plan upfront rather than topping up multiple times. It’s almost always cheaper.

WiFi as a Backup — and When It Lets You Down

Vietnam has genuinely good WiFi in hotels, cafes, and restaurants in cities and major tourist towns. Most places display the password on a chalkboard or hand you a card with it. The smell of Vietnamese drip coffee and the soft click of laptop keyboards in a Da Nang cafe has become as normal as any co-working space — connectivity here is taken seriously by hospitality businesses.

Where WiFi fails you:

• On motorbikes or in moving vehicles — no WiFi means no real-time navigation
• At bus stations, on sleeper buses, and at rural guesthouses
• When using Grab, Gojek, or Be ride-hailing apps, which require live data
• Checking live schedules on dsvn.vn (the official Vietnam Railways site) while traveling between cities
• Airport WiFi often requires a local phone number for registration, which creates a circular problem if you don’t have one yet

The bottom line: WiFi works as a supplement. A local SIM or eSIM is what keeps you moving freely.

Common Mistakes That Get SIMs Deactivated

These come up regularly for travelers who don’t know the current rules:

• Buying from unauthorized vendors. Street sellers, some small phone repair shops, and informal resellers often cannot complete proper biometric registration. Your SIM may work for a day or two before being flagged and cut off.



• Using a locked phone. If your phone is carrier-locked to your home network, a Vietnamese SIM simply won’t work. Check with your home carrier before you travel.
• Assuming photocopies are fine. They are not. You need your original passport at the point of purchase, every time.
• Buying a SIM for someone else. The biometric registration ties the SIM to one person’s face and passport. You cannot register a SIM in your name for another traveler in your group — each person needs to register their own.
• Not checking APN settings. In rare cases where the vendor doesn’t configure the phone, data may not connect automatically. The carrier’s app or a quick Google search for “[carrier name] APN settings Vietnam” fixes this in under a minute.

Frequently Asked Questions

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

Yes, and it must be your original passport — photocopies are not accepted. Since late 2023, all SIM purchases require biometric registration, which links your face and passport to your SIM. This applies to both physical SIMs and eSIMs purchased from Vietnamese carriers. The process takes two to five minutes at any official vendor.

Can I buy a Vietnam SIM card at the airport?

Yes. Kiosks for Viettel, Mobifone, and Vinaphone are located in the arrivals halls of all major international airports including Noi Bai (Hanoi), Tan Son Nhat (Ho Chi Minh City), Da Nang, and Phu Quoc. Prices are slightly higher than in-city stores, but activation is immediate and staff are accustomed to helping foreign travelers.

Which carrier has the best coverage in rural Vietnam?

Viettel has the most extensive rural and mountainous coverage in Vietnam. If your trip includes areas like Ha Giang, Cao Bang, the Central Highlands, or remote coastal regions, Viettel is the safest choice. Mobifone and Vinaphone are competitive in cities and popular tourist towns but can be patchy in very remote areas.

Are eSIMs available for Vietnam, and how do they work?

Yes. You can buy Vietnam eSIMs from Viettel, Mobifone, and Vinaphone directly, or from international providers like Airalo, Holafly, and Nomad. After purchase, you receive a QR code and scan it in your phone’s settings to activate. Your phone must be eSIM-compatible and unlocked. In-store purchases from Vietnamese carriers still require biometric registration.

How much does a tourist SIM card cost in Vietnam in 2026?

Tourist SIM packages range from approximately 150,000 VND (~$6 USD) for a 10-day plan up to 300,000 VND (~$12 USD) for a 30-day plan with 90–120GB of high-speed data. All packages drop to reduced-speed unlimited data after the high-speed cap. Prices have stayed relatively stable compared to 2024.

📷 Featured image by Nguyen Dang Hoang Nhu on Unsplash.