Vietnam Travel Guide

Vietnam eSIM: The Complete Guide for New Zealand Travellers

Vietnam is one of the great value-packed trips for New Zealand travellers, from the old quarter of Hanoi and the limestone karsts of Ha Long Bay to the beaches of Da Nang and the food streets of Ho Chi Minh City. A Vietnam eSIM gets you online the moment you land, with no airport SIM queues, no plastic card to swap, and no roaming bill waiting when you get home. This guide covers how an eSIM works, how much data you’ll actually use, which areas have strong coverage and which don’t, whether your phone is compatible, and exactly how to set it up before you fly.

Browse Vietnam eSIM plans

Why you need data in Vietnam

Vietnam is brilliant to travel, but a lot of the day-to-day runs through your phone. You’ll lean on Grab to get a ride or order food, Google Maps to navigate the chaos of Hanoi and Ho Chi Minh City traffic, translation apps for menus and street signs, and messaging to stay in touch with tour operators, homestays and bus companies. The moment you land at Noi Bai or Tan Son Nhat, it helps to already be online so you can call your hotel, book a Grab and skip straight past the airport touts.

Free Wi-Fi is common in Vietnamese cafes and hotels, but it’s patchy once you’re on the move, on a sleeper bus between cities, on a boat in Ha Long Bay, or out in the countryside. Having your own reliable data turns the trip from stressful to smooth.

What is a Vietnam eSIM?

An eSIM (embedded SIM) is a digital SIM card built into most modern smartphones. Instead of slotting in a piece of plastic, you load a data plan onto your phone electronically, usually just by scanning a QR code. A Vietnam eSIM is simply a data plan that connects your phone to local Vietnamese mobile networks while you’re there.

Because it’s digital, you can buy and install it from home in New Zealand, days or even weeks before your trip, and keep your existing NZ SIM in place at the same time. Your everyday number stays active for calls and texts, and the eSIM quietly handles your data once you land. Most recent phones can run two SIMs at once, so there’s no need to choose between them. It also means you skip the passport registration that Vietnam requires for physical tourist SIMs bought in-country.

eSIM vs the alternatives (and why Kiwis choose eSIM)

There are a few ways to get online in Vietnam. Here’s how a travel eSIM compares to the usual options for a New Zealand traveller:

• Roaming with your NZ provider. Roaming on your existing Spark, One NZ or 2degrees plan is the most convenient option, but it’s usually the most expensive, often charged as a daily fee that quietly adds up over a two or three week trip. It’s always worth checking your provider’s roaming rates before assuming it’s the best deal.
• A physical SIM at the airport or in town. You can buy a tourist SIM when you arrive, but you’ll queue after a long flight, swap out your NZ SIM, and register with your passport to comply with Vietnamese rules. Airport counters also tend to charge more than the same plan in town.
• Pocket Wi-Fi rental. A rented Wi-Fi hotspot works, but it’s another device to carry and keep charged, you have to collect and return it on time, and if it runs flat or gets left at a homestay, everyone sharing it is suddenly offline.
• A travel eSIM. Set up before you fly, nothing to collect or return, nothing extra to carry or charge, and your data simply starts when you arrive. For most travellers it’s the cleanest balance of cost and convenience, which is exactly why eSIMs have become the default for independent travellers.

How much data do you need for Vietnam?

How much data you need comes down to how you travel. The things most travellers actually do in Vietnam, Grab rides, maps, messaging, translating menus and the odd photo upload, don’t burn through huge amounts. As a rough guide:

• Light use. Mostly maps, messaging, Grab and checking a few things online. If you’re happy to be offline a lot and just need directions and to stay in touch, a smaller plan stretches a long way over a week or two.
• Moderate use. Daily navigation, social media, translation, uploading photos and the occasional video call home. This is where most travellers land, and a mid-size plan over one to two weeks usually does the job comfortably.
• Heavy use. Streaming on long bus or train journeys, hotspotting a laptop to work remotely, daily video calls, or constantly sharing high-res photos and stories. If that sounds like you, lean towards a larger plan.

A few easy ways to make your data go further: download offline maps of your route in Google Maps before you go, save Google Translate’s offline Vietnamese pack, and use your hotel or homestay Wi-Fi for the big jobs like photo backups and app updates.

Our Vietnam plans come in a range of sizes and durations, so you can match one to the length and style of your trip. See current Vietnam plans and pick the right size →

Will my phone work with a Vietnam eSIM?

To use an eSIM, your phone needs to be two things: eSIM-compatible and carrier-unlocked. Most phones released in the last few years support eSIM, including:

• iPhone: iPhone XR, XS and every model since, plus iPhone SE (2020) and later.
• Google Pixel: Pixel 3 and later (a handful of early carrier variants aside).
• Samsung Galaxy: Galaxy S20 and later, plus recent Z Fold and Z Flip models.
• Many other recent Android flagships support eSIM too.

Two quick checks before you buy:

• Is it eSIM-capable? On iPhone, open Settings > General > About and look for an “Available SIM” or EID entry. On Android, dial *#06# and look for an EID number, or check your SIM manager in Settings.
• Is it unlocked? If you bought your phone outright or it’s out of contract, it’s almost certainly unlocked. If you’re not sure, a quick message to your provider will confirm it.

One important note: some phones bought in mainland China are sold without eSIM support, even when the same model supports it everywhere else. If your handset was purchased in mainland China, check carefully before buying a plan. And if your phone doesn’t support eSIM at all, a physical travel SIM or pocket Wi-Fi is the way to go instead.

How to set up your Vietnam eSIM

The whole process takes just a few minutes, and you can do most of it from your sofa at home:

Tip: Install the eSIM while you’re still on Wi-Fi at home in New Zealand, a day or two before you fly. That way everything’s ready and you only have to flick one setting when you arrive.

When does my eSIM start? (Installing vs activating)

This is the part that trips people up, so it’s worth being clear: installing your eSIM and starting your data are two different things. Installing simply loads the eSIM onto your phone, and it’s safe to do this the moment you receive it, well before you leave New Zealand.

Your plan’s data allowance and validity period generally don’t start counting down until the eSIM connects to a network in Vietnam. So you can get everything set up in advance without “using up” your plan early, then simply arrive and connect. If you ever want to confirm the exact activation terms for a specific plan, they’re shown on that plan’s page and in your confirmation email.

Coverage: cities, mountains and the coast

Vietnam has strong mobile coverage across its cities and main tourist routes, and which areas thin out is worth knowing if your trip heads into the mountains or far out to sea.

• Hanoi, Ho Chi Minh City, Da Nang and Hoi An. Excellent 4G and growing 5G across the cities, so Grab, maps and messaging all work without a hitch in the old quarters, downtown areas and along the central coast.
• Ha Long Bay and the coast. Good coverage close to shore and on the main tourist boats, but it can drop the further out you cruise among the limestone karsts. If you’re on an overnight boat, expect patches with no signal.
• Sapa, Ha Giang and the northern mountains. Coverage follows the towns and main roads reasonably well, but it gets patchy on the famous Ha Giang Loop motorbike route and on remote trekking trails around Sapa’s rice terraces. Download offline maps before you set off into the highlands.

A few ways your data really earns its keep in Vietnam: getting around with Grab in the cities, reading menus with Google Translate’s camera, booking buses and homestays on the go, and sharing photos and stories from wherever you are. A Vietnam eSIM connects to a local Vietnamese network, and the supported network is shown on the individual plan.

Frequently asked questions