Essential Tips for Using Your Phone and Internet in Vietnam

You step off the plane in Vietnam tired and sweaty, and you need a Grab ride, a map and a message to your hotel. Then you find out that getting a SIM card is no longer a quick cash deal with a stranger at a stall. Since 2024, Vietnam has enforced strict SIM registration, and by 2026 you cannot activate a SIM without a passport and biometric check. This guide explains exactly how to get connected, which option suits your trip, and what to avoid.

Which Network to Choose

Vietnam has three main mobile network operators. All three offer 4G LTE nationwide, and by 2026 each has significantly expanded 5G coverage in major cities and tourist hubs.

• Viettel: The largest operator and state-owned. It is known for the most extensive coverage, including rural and remote areas, and generally reliable speeds.
• Mobifone: The second-largest operator, with good coverage in urban areas and major tourist destinations.
• Vinaphone: Part of VNPT (Vietnam Posts and Telecommunications Group). It has good coverage in populated areas and competitive pricing.

In cities, average 4G download speeds run around 30-50 Mbps, and 5G is significantly faster. If your route includes countryside or remote areas, Viettel is the safest pick. If you only visit cities and beach towns, any of the three will do, so choose on price and plan size.

Buying and Registering a Physical SIM

Where to buy

• International airports: The easiest option. Viettel, Mobifone and Vinaphone kiosks operate at Tan Son Nhat (Ho Chi Minh City, SGN), Noi Bai (Hanoi, HAN), Da Nang (DAD) and Cam Ranh (Nha Trang, CXR). Prices may be slightly higher than in city stores, but being online before you reach the taxi rank is usually worth it.
• Official operator stores: Found in major cities and towns. Look for “Cửa hàng Viettel”, “Mobifone” or “Vinaphone” signs. They offer the widest range of plans and the most reliable registration.
• Convenience stores: Larger chains such as Circle K, FamilyMart and Ministop may sell pre-packaged tourist SIMs. Registration is still required and staff often help, but official stores and airports are safer.
• Street stalls and small shops: Skip them. SIMs sold by unofficial vendors may not be properly registered and can be deactivated.

How registration works, step by step

Every SIM, including tourist SIMs, must be registered to a valid identification document. Your original passport is mandatory. A photocopy is generally not accepted.

1. Hand over your passport to the operator staff.



2. Biometric verification. Staff take a photo of you and may require a fingerprint scan, especially at official stores. This links the SIM to your identity.
3. Information entry. Your name, nationality, passport number and passport validity go into the operator’s system.
4. Activation. Staff insert the SIM into your phone, activate it, and usually help you choose and activate a data package.
5. Confirmation. You may get an SMS confirming registration and plan activation.

Expect 10-20 minutes at an airport or official store if there is no queue.

Plans and 2026 Budget Reality

Operators mainly sell prepaid plans, and “Tourist SIMs” are often just rebranded prepaid plans with popular data allowances. The prices below are 2026 estimates based on 2024/2025 trends, at 1 USD = 25,000 VND. Confirm the exact price at the counter before you pay.

Viettel (most popular with tourists)

• Travel SIM, 7 days: 15GB high-speed data (about 2GB/day), unlimited local calls, 20-50 local SMS. About 100,000 VND (approx. 4 USD).
• Travel SIM, 15 days: 30GB, unlimited local calls, 50-100 local SMS. About 150,000 VND (approx. 6 USD).
• Travel SIM, 30 days: 60GB, unlimited local calls, 100-200 local SMS. About 250,000 VND (approx. 10 USD).
• “Unlimited” with Fair Usage Policy: Typically 3-5GB a day at high speed, then throttled to 512kbps-1Mbps. A 30-day plan costs around 300,000-400,000 VND (approx. 12-16 USD).

Mobifone and Vinaphone

• Mobifone “Happy Tourist SIM”: 10 days with 20GB and 100 local minutes for about 120,000 VND (approx. 4.80 USD). 30 days with 40GB and 200 local minutes for about 220,000 VND (approx. 8.80 USD).
• Vinaphone “Tourist SIM”: 15 days with 25GB and 50 local minutes for about 130,000 VND (approx. 5.20 USD). 30 days with 50GB and 100 local minutes for about 230,000 VND (approx. 9.20 USD).

Check the operators’ sites for tourist sections: viettel.vn, mobifone.vn and vinaphone.com.vn.

What to budget

• Budget: A Viettel 7-day Travel SIM at about 100,000 VND (approx. 4 USD), or a 30-day Viettel, Mobifone or Vinaphone plan at about 220,000-250,000 VND (approx. 8.80-10 USD).
• Mid-range: A 30-day “unlimited” Viettel plan at about 300,000-400,000 VND (approx. 12-16 USD), if you stream, hotspot or work online.
• Comfortable: A third-party eSIM at about 25-35 USD (approx. 625,000-875,000 VND) for 10GB over 30 days, or a portable WiFi hotspot at about 5-10 USD (125,000-250,000 VND) per day.

How eSIMs Work for Tourists

eSIM support has grown a lot since 2024. Viettel, Mobifone and Vinaphone all fully support eSIM for both locals and tourists, so you can skip the physical swap if your phone is eSIM-compatible.

Two ways to get one

• Directly from an operator, in store: Present your passport for registration, as with a physical SIM. Staff give you a QR code, and scanning it downloads the eSIM profile to your phone.
• Directly from an operator, online: Some operators may let tourists buy online by uploading passport details and receiving a QR code by email. This is still less common than in-store purchase because of strict ID checks, so confirm whether it is available before you rely on it.
• Third-party providers: Often the easiest route. Examples include Airalo, Klook, Holafly, Nomad and Gigsky.

Buying from a third-party provider

1. Open the provider’s website or app.
2. Choose a Vietnam data package, for example 10GB for 15 days.
3. Pay with an international credit card.
4. Receive a QR code by email or inside the app.
5. Scan the QR code on your eSIM-compatible phone to install the profile.
6. Activate the eSIM when you arrive in Vietnam.

Pros: You buy before you travel, there is no SIM swap, and your home SIM stays active for calls and SMS. Cons: These plans are often data-only with no local calls or SMS, can cost more than local SIMs for large data volumes, and rely on roaming agreements with local operators.

Estimated third-party prices for 2026: 1GB for 7 days is about 5-7 USD (125,000-175,000 VND), 5GB for 15 days is about 15-20 USD (375,000-500,000 VND), and 10GB for 30 days is about 25-35 USD (625,000-875,000 VND). That is higher per GB than a local SIM, which is the price of convenience.

WiFi, Hotspots and Connectivity on the Road

Free WiFi is everywhere in Vietnamese cities. Hotels, hostels and guesthouses almost always offer it, usually at good speeds. Most cafes and restaurants do too, so look for a sign or ask staff for the password. Airports and shopping malls also have free WiFi, though speed and security vary.

Public WiFi can be insecure and slows down when many people share it. Use a VPN for banking, work logins or anything personal.

Portable WiFi hotspots

Several companies rent portable hotspots, with pickup at airports or delivery to hotels. You get a private, secure network for several devices. Expect about 5-10 USD (125,000-250,000 VND) per day in 2026, with discounts for longer rentals, and often a security deposit. Rental providers change often, so check the current options before you book.

Buses, taxis and trains

Buses and taxis generally have no free WiFi, so rely on your own data. Some longer-distance Vietnam Railways trains, especially tourist-oriented carriages, may offer free WiFi, but it is often slow or unreliable. Assume you will use mobile data on the train.

Topping Up and Tracking Your Data

• Scratch cards: Sold at convenience stores, operator stores and small shops. Follow the instructions on the card, which usually means dialling a code such as *100*CARD_NUMBER#.
• Operator apps: My Viettel, My Mobifone and My VNPT let you top up with a local bank card, and sometimes with international cards. Do not count on international card support.
• Online top-up: Through operator websites or third-party platforms such as Thegioididong.com and FPTShop.com.vn, usually with local payment methods.
• In store: Staff can top up your account for cash.

To check your balance, use the operator app or a shortcode. For Viettel, dial *101#. Check data use regularly so you do not run out on a long bus ride.

Apps Worth Installing Before You Land

• Zalo: The dominant messaging app in Vietnam, similar to WhatsApp. Many businesses communicate through it.
• Grab and Gojek: Ride-hailing, food delivery and package delivery. Motorbike taxis are very common and cheap.
• Google Maps or Maps.me: Navigation. Download offline maps in advance.
• Google Translate: Or a similar translation app for menus and signs.

Common Mistakes to Avoid

• Buying from a street stall or small shop. The SIM may not be properly registered and could be deactivated.
• Arriving with a locked phone. It will not accept a local SIM.
• Bringing only a passport photocopy. The original is required.
• Throwing away the SIM packaging. It often shows the SIM number and PIN, which you may need for activation, support or top-ups.
• Assuming an eSIM will include local calls. Many third-party eSIMs are data-only. Use Zalo or WhatsApp for calls, or choose a local plan with call minutes.
• Using public WiFi for banking. Use a VPN or your own data.
• Forgetting to tell your bank. Notify them of your travel plans to avoid blocked international card transactions.

Frequently Asked Questions

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

Yes. Since early 2024, every SIM in Vietnam must be registered to a valid ID, and tourists need their original passport. Photocopies are generally not accepted. Staff will also take your photo and may scan your fingerprint. The process usually takes 10-20 minutes at an airport or official store if there is no queue.

Is an eSIM or a physical SIM better for tourists?

It depends on your priorities. An eSIM from Airalo, Klook, Holafly, Nomad or Gigsky can be bought before you land and lets you keep your home SIM active. A local physical SIM usually gives more data per dollar and includes local calls and SMS. Choose eSIM for convenience and a physical SIM for value.

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

Based on 2026 estimates, a 7-day Viettel Travel SIM costs around 100,000 VND (about 4 USD) with 15GB, and a 30-day plan with 60GB costs around 250,000 VND (about 10 USD). Mobifone and Vinaphone 30-day plans are around 220,000-230,000 VND. Confirm the current price at the counter before paying.

Which network has the best coverage in Vietnam?

Viettel is the largest operator and is known for the most extensive coverage, including rural and remote areas. It is the safest choice if your route goes beyond the cities. Mobifone and Vinaphone both work well in urban areas and major tourist destinations, so they suit city and resort trips.

Is public WiFi in Vietnam safe to use?

Free WiFi is common in hotels, cafes, airports and malls, but security and speed vary. Avoid banking or sensitive logins on public networks unless you use a VPN. For anything private, switch to your SIM or eSIM data, or use a portable WiFi hotspot, which gives you a private network.

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📷 Featured image by Claire on Unsplash.