If you already know you're going to need data and the only thing left is to decide on the package size, this guide is about that: how many GB you really need for Vietnam, not how many you'd like to have just in case. I'll give you the conclusion upfront, because I hate articles that hide the number: in Vietnam, you'll spend a lot less than you think, and the reason has a name and surname: free Wi-Fi. Here's the figure by profile, by days, and by stage of the journey from north to south.
The quick answer: the GB you need for Vietnam
For 10 days in Vietnam, most people will be fine with 3 GB. If you upload a lot of photos and live on Instagram, go for 5 GB. Only if you telecommute or share a connection with your family do you need 10 GB or more. The free Wi-Fi here does most of the work.
I know that number sounds low compared to what's sold out there. The explanation is simple: on a tourist trip, the phone is used in short bursts —checking the map, ordering a Grab, translating a menu, sending four audio messages— and those bursts cost megabytes, not gigabytes. What really empties a data package is video: series on the bus, endless reels, uploading 4K videos to the cloud. And exactly that, in Vietnam, you'll almost always do connected to a Wi-Fi network that costs you nothing.
My mental rule, after doing the math on many trips: count 200-300 MB per day for a normal tourist who uses maps, messaging, some social media, and a few searches. Multiply by the number of days and add a 30% buffer. Ten days comes out to 2-3 GB; fifteen days, 4-5 GB. No more, no less. If you want the general framework for how this is calculated for any country, I develop it in the main guide on how much data you need for travel, but for Vietnam specifically, keep reading, because there are nuances that change the number in both directions.
Vietnam's Wi-Fi plays in your favor (and a lot)
This needs to be said loud and clear: Vietnam is one of the easiest countries in the world to get free connectivity. It's not just my impression; it's what you'll find within ten minutes of landing. Hotels, hostels, cafes, restaurants, co-working spaces, shopping malls, airports, tourist buses... and even street stalls selling bánh tráng nướng where you get something for a few thousand dongs and the vendor tells you the password without you even asking. Coffee culture is huge in Hanoi and Saigon, and a coffee with Wi-Fi costs less than a metro ticket in Spain.
The speed isn't symbolic either. Vietnam has one of the fastest and cheapest connections in Southeast Asia, and in practice, that means you can upload your day's album, make a video call home, or download a series while you eat dinner, without touching a single megabyte of your plan. The only honest downside: between 6 PM and 9 PM, shared networks get saturated, and you'll notice half the promised speed. That's what your mobile connection is for, as a safety net, not as a primary source.
In Vietnam, Wi-Fi isn't an extra at your accommodation: it's street infrastructure. Plan your heavy downloads for when you're sitting down having something to eat, and your data package will last twice as long.
If you want the details of how connectivity works in the country, what operators there are, and how each option compares, you can find it in internet in Vietnam. Here, we're only interested in one consequence: Wi-Fi lowers the number of GB you buy.
Where you will use data in Vietnam
Now for the other side of the coin, because I don't want to tell you that 1 GB is enough for the whole country. There are four very Vietnamese situations where your phone really works hard, and it's worth keeping them in mind:
- Grab. This is the app that moves the country: moto-taxi, car, food delivery. You'll open it six, eight, ten times a day. Each trip is about 10-20 MB between the live map, the chat with the driver, and tracking. Little per trip, but it adds up.
- The camera translator. Outside tourist areas, English is scarce, and menus are in Vietnamese. Pointing your camera at a menu, a bus sign, or a pharmacy label becomes a daily gesture. Download the offline Vietnamese package, and it goes from costing megabytes to costing zero.
- Long journeys. Night train Hanoi-Huế, sleeper bus to Ninh Bình, eight hours to Đà Lạt. That's where people start watching series and burn through their package in two evenings.
- Photos. Vietnam is an obscenely photogenic country, and you'll be snapping hundreds of photos a day. The problem isn't the photos: it's the automatic backup.
These four things explain almost all of a traveler's actual consumption in Vietnam. The first two are cheap and self-regulating; the last two are what determine whether 3 GB is enough or if you need 10. Good news: the last two are also the easiest to move to Wi-Fi.
How much each app actually consumes (in MB)
Before choosing a package, it's good to have the figures in front of you, because intuition can be very misleading. Chatting seems to use data, but it hardly uses any; watching video seems harmless, but it eats up 80% of any plan. This is the table I use for calculations, with real ranges per hour or per action:
| Activity | Approximate consumption | On a travel day |
|---|---|---|
| Maps and navigation (Google Maps) | 5-10 MB per hour | 20-40 MB |
| WhatsApp: text, audio, and photos | 5-10 MB per hour | 30-60 MB |
| Grab (ordering a motorbike or car) | 10-20 MB per trip | 60-150 MB |
| Camera translator | 2-5 MB per query | 20-50 MB |
| Social media (Instagram or TikTok scroll) | 600-900 MB per hour | 300-900 MB |
| Upload 50 photos to the cloud | 200-350 MB | 200-350 MB |
| Video call (WhatsApp) | 300-500 MB per hour | 150-500 MB |
| Music streaming (normal quality) | 40-70 MB per hour | 80-200 MB |
| Video at 480p | ≈550 MB per hour | 1 GB or more |
| Video at 1080p | 2-3 GB per hour | out of budget |
Look at the difference in scale: a whole week of maps uses less than twenty minutes of high-definition video. That's why the GB recommendation doesn't depend on how many hours you use your phone, but on what you do with it. If you want to delve deeper into these measurements and see where they come from, I break them down in the mobile data usage statistics by activity.
How many GB per profile and duration: the article's table
This is the table you've been looking for. Find your row, find your column, and that's your number. I've calculated assuming what really happens in Vietnam: that you sleep in places with Wi-Fi, that you have breakfast in cafes with Wi-Fi, and that you do heavy downloads there. If you're going to travel through rural areas without fixed accommodation, step up a level.
| Traveler profile | 5 days | 10 days | 15 days | 30 days |
|---|---|---|---|---|
| Map and WhatsApp tourist | 1 GB | 3 GB | 3-5 GB | 10 GB |
| Photo and social media user | 3 GB | 5 GB | 10 GB | 20 GB |
| Digital nomad / remote worker | 10 GB | 20 GB | 30 GB | 50 GB or unlimited |
| Family sharing (2-3 phones) | 5 GB | 10 GB | 15-20 GB | 30 GB or more |
Three notes to read it correctly. First, the top row is the most common and the most underestimated: many people buy 10 GB for ten days and return home with 7 unused. Second, if you are a couple and you are together almost all the time, with a single package shared via hotspot, you will manage; you don't need two 5 GB plans, you need one of 5-8 GB. Third, the remote work row is the only one where I recommend overbuying: a one-hour video meeting per day is 20-30 GB per month just for that, and working while watching the meter is awful.
And a warning about "unlimited": there's almost always fine print regarding speed after a certain daily threshold. If they sell you unlimited, check how many GB will be at maximum speed before it slows down; that's the number that matters.
Your route from north to south, stage by stage
The classic route —Hanoi, Ha Long, perhaps Sapa, Hoi An, Ho Chi Minh— doesn't consume the same in all its sections. There are stages where you'll hardly spend anything because there will be no coverage, and stages where your mobile will be your only companion for eight hours. This table is what I would have liked to have before my first time:
| Stage | Coverage | Expected consumption |
|---|---|---|
| Hanoi (Old Quarter) | Solid 4G/5G, Wi-Fi on every corner | Low: 150-250 MB/day |
| Ha Long Bay cruise | Irregular; drops off when moving away from the coast and between islets | Almost none |
| Sapa and mountain trekking | Good in the village, patchy in rice paddies and high homestays | Very low |
| Night train (Hanoi-Huế / Đà Nẵng) | Intermittent, cuts out in tunnels and rural areas | High if watching video: 1-2 GB per night |
| Sleeper bus between cities | Decent on main roads | Medium-high: 500 MB-1 GB |
| Domestic flights | No data in flight | Zero |
| Hoi An | Excellent, and the city is walkable | Low: 100-200 MB/day |
| Ho Chi Minh (Saigon) | Fast 4G/5G throughout the urban area | Medium: constant Grab, 250-400 MB/day |
Notice the pattern: the most spectacular stages are precisely the ones that use the least data, because there's no signal to use. The Ha Long cruise and the mountain days in Sapa are a break for your package, not a threat. The threat is long journeys, and those are tamed by downloading the series or podcast the night before, at the hotel. If you also want to know how the specific connection you'll be using there works, I explain it in the eSIM for Vietnam guide.
Calculate your own consumption before leaving home
All of the above are averages, and you are not an average. There's an honest, two-minute method to find out how many GB you consume: look at what you already consume in your normal life. On Android, go to Settings > Network & Internet > SIM > App data usage and choose the last full cycle. On iPhone, Settings > Mobile Data, scroll down to the app breakdown (remember to reset statistics from time to time, otherwise they accumulate from when you bought the phone).
With that number in hand, make this correction for Vietnam:
- Divide by 30 to get your daily consumption at home.
- Subtract what you spend on Wi-Fi at work or at home, which you will replace with Wi-Fi from cafes and hotels there. In practice, it remains almost the same.
- Add 100 MB per day for the newness of the trip: maps, Grab, translator, and constant searches.
- Multiply by the number of days and add 30% as a buffer.
A real example: if in Spain you spend 6 GB per month, that's 200 MB per day; add 100 and you're at 300 MB daily. For fourteen days, that's 4.2 GB, plus the buffer, 5.5 GB. Buy 5 GB and top up if necessary. This calculation is more accurate than any generic recommendation, including mine, because it's based on your habits and not those of a theoretical traveler. If the number seems outrageous, see which app is consuming it: there's almost always a single culprit, and it usually starts with automatic video playback.
Settings to make 3 GB seem like 6
Half an hour of preparation the night before you fly will save you half the consumption of your trip. These aren't guru tricks, they're four switches and that's it:
| Setting | Where | What it saves you |
|---|---|---|
| Vietnam maps downloaded offline | Google Maps > profile > Offline maps | Almost all navigation consumption |
| Photo backup only via Wi-Fi | Google Photos / iCloud > Backup | 200-500 MB per day |
| Autoplay disabled | Instagram, TikTok, X, Facebook | Hundreds of MB per session |
| Vietnamese downloaded in translator | Google Translate > Offline languages | All translator usage |
| Video limited to 480p | YouTube and Netflix settings | Up to 2 GB per hour watched |
| Data Saver mode activated | System and Chrome settings | 10-30% of total |
| App updates only via Wi-Fi | Play Store / App Store | Hundreds of MB intermittently |
Add two very Vietnamese habits. First: download the night before what you're going to consume on the train or bus the next day —series, podcasts, playlists—, always at the hotel. Second: when you sit down for a Vietnamese coffee with condensed milk, connect and let your phone upload the day's photos while you watch the street. It's literally the moment the coffee pays for itself. I have a long list of these tricks, with exact settings per operating system, in how to save mobile data while traveling.
What happens if you run out (and why it's better than having too much)
Let's be practical: if you run out of data in Vietnam, nothing serious will happen. You'll lose your mobile connection, yes, but you'll still have Wi-Fi at the hotel, at the café next door, and at the restaurant across the street. You go in, top up from the app in two minutes, and continue. It's one of the few countries where running out of gigabytes is a minor inconvenience, not an emergency. In a desert or on a remote island, I'd say the opposite; not here.
Overbuying, on the other hand, does have a cost, and it's a guaranteed cost: you pay in advance for gigabytes that will remain unused when the package expires. That's why my advice always goes in the same direction: buy the package that covers your probable scenario, not your catastrophic scenario, and know where to top up. That calculation almost always works out better for you.
Buying too little with the option to top up is a reversible decision. Buying too much is a definitive decision: that money is not coming back.
A couple of nuances if you're cutting it close. When you have 300-400 MB left, activate data saving and lower video quality to the minimum: that will stretch out a couple of days of basic use. And if you're traveling with someone, sharing a connection between phones distributes the problem while one of you tops up. If this idea of managing your plan from your phone without changing cards still sounds strange to you, I explain it from scratch in what an eSIM is.
Frequently asked questions
The most common questions I get when someone is about to buy data for a two or three-week trip to Vietnam:
Is 3 GB enough for 10 days in Vietnam?
Yes, for a normal tourist, 3 GB covers ten days with plenty to spare. It's enough for maps, messaging, several Grab rides a day, a translator, and some social media. It will be even more so if you download offline maps and only back up photos over Wi-Fi.
How many GB do I need if I go for a whole month?
10 GB per month is more than enough for a traveler using maps and messaging; 20 GB if you're active on social media. Only if you work remotely from there should you consider 50 GB or an unlimited plan. A month in Vietnam with Wi-Fi everywhere goes a long way.
Is there coverage during the cruise in Ha Long Bay?
There's signal near the coast and on large boats, but it becomes patchy among the islets. Expect to be without a connection at times. Most boats offer their own Wi-Fi, though it might be weak. This is a period of practically zero consumption, so don't include it in your calculations.
What about in Sapa or while trekking in the mountains?
In Sapa town, there's good coverage; in the rice fields, villages, and high-altitude homestays, there are clear gaps. Download your route on an offline map before heading up and let people at home know you'll be unreachable for a few hours. You'll use less data those days, not more.
Do I need more data for using Grab all the time?
No, Grab is data-light: about 10-20 MB per trip. Even if you order eight rides a day, we're talking about 100-150 MB. It consumes much less than fifteen minutes of video. The important thing is to have a connection on the street to order it, not to have a huge data package.
Can I share my data with my partner or family?
Yes, tethering works normally and is the cheapest way to travel in a group. A 10 GB package shared between two phones is usually better than two 5 GB packages. However, the phone sharing will use more battery: carry a power bank.
Do I need a VPN in Vietnam and does it consume extra data?
It's not essential for a tourist: common apps and websites work normally. If you use it habitually for banking or work, keep in mind that it adds between 5% and 15% to consumption due to encryption. It's a small margin, but worth noting.
What if I run out of gigabytes halfway through my trip?
You can top up from your hotel or any cafe with Wi-Fi, in a couple of minutes. Finding free Wi-Fi in Vietnam is trivial, so running out of data is a minor inconvenience. That's why it's better to buy a suitable amount and top up later than to overpay in advance.
Conclusion
To summarize directly. For a typical 10-day trip to Vietnam, 3 GB is enough for most; if you're into photos and social media, 5 GB; if you go for two weeks, between 5 and 10 GB depending on your profile; if you telework, 20-30 GB. And if two or three of you are traveling, a single larger package with shared connection is better than several small ones. I say this even though we sell larger packages: I'd rather you come back happy and repeat your purchase than pay for gigabytes you won't use.
What makes Vietnam special is that free Wi-Fi is everywhere and it's genuinely good, so your mobile connection only needs to cover the street, commutes, and moments without coverage. With downloaded maps, an offline translator, and backups tied to Wi-Fi, a modest package will last the entire trip. Once you've decided, choose your plan on the Vietnam data page, activate it before leaving home, and forget about it: you'll land in Nội Bài or Tân Sơn Nhất with working internet and your first Grab ordered before picking up your luggage.
