SIM & Internet

Can I activate a Vietnam travel eSIM before arrival, or do I need to wait until I land in Vietnam?

Travelers report that some Vietnam travel eSIMs may not activate while still in Russia. The safer option is to activate after landing using airport Wi‑Fi; if your phone does not support eSIM, buy a local physical SIM on arrival.

1 source · 17 days ago

Can I use a local Vietnamese SIM for data while keeping my home SIM for SMS in a dual-SIM phone?

Yes, in a dual-SIM phone you can use a local Vietnamese SIM for mobile data while your home SIM receives SMS for free — just make sure to disable data roaming on your home SIM before arrival.

1 source · 24 days ago

Can you activate an eSIM for Nha Trang before landing, using Wi‑Fi while your phone is in airplane mode?

Yes, you can buy and activate an eSIM before landing, even while the plane is still at the gate if Wi‑Fi is available. Airplane mode does not prevent Wi‑Fi from working, so setup can be done before you leave the airport.

2 sources · 11 days ago

Can you buy a SIM card at Nha Trang airport and how much does it cost?

Yes, tourist SIM cards (e.g. Viettel) are available at Nha Trang airport. An unlimited plan for 30 days costs around 800 RUB; note that renewal may require a top-up of 150,000 VND.

2 sources · 35 days ago

Can you make phone calls with an eSIM in Nha Trang, Vietnam — does Wi-Fi calling (VoWiFi) work?

A travel eSIM in Nha Trang provides data only, not a real phone number for calls — you make calls via WhatsApp/Telegram using that data connection. Home-carrier Wi-Fi calling (VoWiFi) typically does not work abroad in Vietnam.

2 sources · 2 days ago

Can you make regular phone calls with a Vietnamese SIM or eSIM in Nha Trang, or is it data-only?

Tourist SIM cards and eSIMs sold in Nha Trang are typically data-only — regular cellular calls don't work, you need to call via WhatsApp or another messenger using mobile data.

1 source · 2 days ago

Can you reactivate a Vietnam SIM card after a few months of inactivity in Nha Trang?

Travelers report that it depends on the carrier and the line status: some numbers still worked for calls, but a SIM left empty and unused for several months may already be lost. In practice, people usually check reactivation options with Viettel or MobiFone after arrival.

3 sources · 16 days ago

Can you sign up for Grab or Maxim in Nha Trang with a data-only eSIM, or do you need a regular Vietnamese phone number?

Grab and Maxim usually require a normal phone number that can receive an SMS or verification call. A data-only eSIM is fine for internet and WhatsApp, but it often won’t work for taxi app registration or regular calls to drivers.

2 sources · 13 days ago

Does a home country SIM card work in Vietnam for receiving SMS and calls?

Your home SIM card will work in Vietnam for receiving calls and SMS, but mobile data should be disabled. Answering incoming calls is expensive — better to decline and call back via messengers.

1 source · 5 days ago

Does eSIM work on iPhone in Nha Trang Vietnam, and can I keep my home SIM for calls?

eSIM works on iPhone in Nha Trang and can be purchased in advance via Trip.com. Use eSIM for data and keep your home SIM active for calls via roaming — just disable roaming on the physical SIM and enable it on the eSIM.

1 source · 10 days ago

Do I need to re-register my Vietnamese SIM card and what happens if I miss the deadline?

Vietnam is rolling out mandatory SIM re-registration with face verification at carrier offices. If your SIM is linked to a bank, Zalo, or Grab, don't delay. Also, fully disable your home SIM before arrival to avoid surprise roaming charges.

2 sources · 29 days ago

Do you need a passport to buy a SIM card in Vietnam?

Not always: some operators sell SIMs without a passport. A monthly unlimited SIM with 60 call minutes costs around 180,000 VND, no documents required.

2 sources · 32 days ago

eSIM vs local SIM card in Nha Trang — which is better?

Both options work, but a local SIM bought at a telecom kiosk in Nha Trang is generally more reliable and cheaper. eSIM via Trip.com is convenient for pre-arrival setup but reviews are mixed.

1 source · 21 days ago

How do I activate a Trip.com eSIM for Nha Trang so mobile data works as soon as I land?

Travelers recommend buying an eSIM on Trip.com and activating it before arrival using the email instructions. In most cases, you should turn off mobile data on your main SIM, enable the eSIM, and allow data roaming for it so it starts working right after landing in Nha Trang.

1 source · 10 days ago

How much does a tourist eSIM or SIM card cost in Nha Trang for 7 to 15 days of mobile data?

Travelers report that eSIMs in Nha Trang typically cost about 250–450 RUB for 14–15 days, while a local 7-day SIM with 50 GB costs around 190,000 VND. Common plans include 7–9 GB per day, and some eSIMs activate immediately on arrival.

3 sources · 17 days ago

How much does a local SIM card with mobile data cost in Nha Trang for 2 weeks or 1 month, and where can travelers buy one?

In Nha Trang, a tourist SIM typically costs about 150,000–250,000 VND for 2 weeks and 200,000–350,000 VND for 1 month, depending on the carrier and data package. The easiest places to buy one are Cam Ranh Airport, official Viettel/VinaPhone/MobiFone shops, and tourist SIM counters in central Nha Trang.

2 sources · 9 days ago

What SIM or eSIM should you use in Nha Trang for regular calls and SMS with Russia, and will a Vietnamese SIM work outside Vietnam?

Travelers most often mention Viettel and eSIMs for using mobile service in Vietnam, but the cost of regular voice calls to Russia depends on the operator and tariff. One important caveat: a Vietnamese SIM, even a yearly Viettel SIM, may not work in Russia unless roaming is supported, so check that before relying on it for verification SMS.

4 sources · 10 days ago

How to find your eSIM phone number in Nha Trang Vietnam for taxi apps

After installing an eSIM, find your number in phone Settings → About Phone or SIM card info. You'll need it to register with local taxi apps.

2 sources · 33 days ago

How to get a SIM card for Nha Trang — buy locally or order in advance?

You can order an eSIM in advance (e.g. via Wildberries or similar services) or a physical SIM through platforms like Tripcom — activate before departure and it works immediately upon arrival in Nha Trang.

2 sources · 24 days ago

How to set up roaming on eSIM or physical SIM card in Nha Trang Vietnam?

For eSIM, enable roaming via your carrier's app or by sending an SMS to your provider. A physical SIM card works without extra setup — messages arrive automatically.

3 sources · 24 days ago

How to use your home SIM card and eSIM in Vietnam without unexpected roaming charges?

Turn off mobile data on your home SIM and enable data roaming only on your eSIM. Incoming SMS and calls are free in roaming. Hotel Wi-Fi is free and works well for calls.

3 sources · 12 days ago

Nha Trang SIM card or eSIM: which option is best for 1–10 days and which mobile network has the most reliable data?

For a short Nha Trang trip, eSIM is usually the easiest option if your phone supports it, since you can activate it before arrival. Viettel is generally the most reliable network; a local physical SIM is often cheaper, typically around 150000–250000 VND for a tourist data package.

3 sources · 6 days ago

Should you activate an eSIM before flying to Nha Trang or after landing at the airport?

Most travelers recommend buying and activating your eSIM before departure — on arrival in Nha Trang you may not have internet right away to activate it, so it's easier to switch it on right after landing.

2 sources · 2 days ago

What can I use in Nha Trang if my phone doesn’t support eSIM and I need mobile data right after arrival?

A workaround mentioned in the chat is the Unisimka eSIM adapter for phones without built-in eSIM support. One user says they’ve been using it for about 2 years without issues, but phones with Chinese firmware should be compatibility-checked in advance.

1 source · 10 days ago

Where can travelers buy a local SIM card in central Nha Trang, and what does a tourist plan usually cost?

The easiest place to buy a SIM card in Nha Trang is an official Viettel, Vinaphone, or Mobifone shop in the city center, including around Nha Trang Center. Based on the chat, a Viettel offer at 570000 VND was considered expensive, so compare plans at official stores and bring your passport.

3 sources · 16 days ago

Where should travelers buy a SIM card in Nha Trang, and how much does it cost?

In Nha Trang, it’s safest to buy a SIM card at an official carrier shop in town rather than from street sellers. Tourist plans are typically around 250,000–350,000 VND, while Viettel can be cheaper for longer stays but may require paying for 3 months upfront.

2 sources · 15 days ago

Where to buy a local SIM card in Nha Trang, Vietnam?

Local SIM cards in Nha Trang are available at carrier stores (Viettel, Vinaphone, Mobifone), the airport, and street vendors. If your phone doesn't support eSIM, get a physical SIM card.

2 sources · 21 days ago

Where to buy an eSIM in Nha Trang and how to get one before or after arrival?

You can buy an eSIM in advance via apps like Trip.com. Physical SIMs are easy to get at the airport or in the city upon arrival.

3 sources · 33 days ago

Where to buy a SIM card in Nha Trang — airport, city, or online before arrival?

The easiest option is to grab a SIM card at any nearby shop in the city — travel agencies, spas, or convenience stores all sell them. Online services like Trip.com are an alternative, but city prices are comparable.

2 sources · 21 days ago

Where to buy a SIM card in Nha Trang and how much does mobile data cost?

Buy a SIM at any carrier store with your passport. A 30-day plan with 6–8 GB/day costs around 200,000 VND. Daily eSIM options are also available.

2 sources · 35 days ago

Where to buy a SIM card in Nha Trang — local SIM vs eSIM?

SIM cards are available throughout Nha Trang city. eSIM can be purchased online via Trip.com. Airport rates are slightly lower but not drastically so.

2 sources · 6 days ago

Where to buy a tourist SIM card in Nha Trang and which carrier is best?

Tourist SIM cards are available at the airport and carrier stores throughout the city. Viettel and Mobifone are the most recommended carriers for tourists.

3 sources · 3 days ago

Which local SIM card to buy in Nha Trang for mobile internet for 1–2 weeks?

In Nha Trang, pick up a SIM from Viettel, Vietnamobile, or Vinaphone — available at the airport, markets, and phone shops. Hotspot tethering to a laptop generally works without speed throttling.

3 sources · 21 days ago

Which SIM card to buy in Nha Trang and how much does it cost?

Get Viettel for around 200,000 VND. Tell the seller you're staying for a month and ask for a data-only plan.

2 sources · 36 days ago

Why can't I send or receive SMS on my Vietnamese SIM card in Nha Trang?

SMS won't work if your Vietnamese SIM has zero balance — top it up at any FPT Shop. Check your balance by dialing *101#.

2 sources · 5 days ago

Why won't eSIM install in Vietnam if my phone supports eSIM?

If you get a device incompatibility error when installing an eSIM in Vietnam, your phone likely doesn't actually support eSIM — Chinese market versions of phones often have dual physical SIM slots instead of eSIM support.

1 source · 30 days ago