2026 Latest Guide: Vietnam Internet – eSIM, Physical SIM, or WiFi Router? Find the Best Option for You!

Robbin

2026-02-05

Getting online in Vietnam comes down to three options: an eSIM, a physical SIM card, or a rented pocket WiFi router. None of them is best for everyone — the right answer depends on how long you are staying, how many of you are travelling, and whether your phone supports eSIM at all. Here is how the three compare.

eSIM — the easiest option

Why people choose it: nothing to swap. You buy it online before you fly, and the moment you land your phone is online. No hunting for a shop, no fiddling with a SIM tray, no risk of losing your home SIM. For anyone who wants to order a car or open a map the second they clear immigration, this is the least friction.

The catch: not every phone supports eSIM. Check your model before you buy — broadly, iPhone XR and later, plus a number of higher-end Android phones.

Best for: short trips, people who would rather do everything online than queue at a counter, and frequent travellers who do not want to keep switching cards.

Physical SIM card — the cheapest and most stable

Why people choose it: it is usually the best value. For a small amount of money you get a lot of data, and the connection is as stable as it gets.

The catch: you have to take your own SIM out and keep it somewhere safe. While the Vietnamese card is in your phone you will not receive calls or verification texts on your usual number, which matters if your bank sends codes by SMS.

Best for: budget travellers who want maximum data for minimum spend, and anyone staying more than a week or two.

Pocket WiFi router — the one to share

Why people choose it: several people can use one device. For a family or a group of friends, renting a single router and splitting the cost works out cheaper than everyone buying their own card. Everyone just joins the same network with a password, which is straightforward even for less confident phone users.

The catch: it is one more thing to carry, and one more thing to charge. If the battery dies, the whole group is offline. Lose it or damage it and the replacement charge can be steep.

Best for: families and groups travelling together, and anyone prioritising cost per person over convenience.

Side by side

Option	What it is good at	Suits	Downside
eSIM	No card to swap; activates online	Short independent trips; comfortable with tech	Older phones do not support it
Physical SIM	Cheapest per gigabyte; large data allowances	Longer stays; heavy hotspot use	Card swap; verification texts go to the stored SIM
Pocket WiFi	Shared by several people; no card swap	Families and groups	Extra device to carry and charge

Pocket WiFi is normally priced per day, so it is the most expensive option for one person and the cheapest once you split it three or four ways. Prices vary by carrier and by plan — check with the provider before you book.

Choosing by trip length and group size

Short trip, 3–5 days, travelling alone: an eSIM. You are online the moment you land, you keep your own number active for bank and verification messages, and you spend none of your short trip queuing at a counter.
Longer stay: a physical SIM. Over a couple of weeks the price difference adds up, and the data allowances are more generous.
Family or group: a pocket WiFi router. One rental, one password, everyone online — and the cost per person drops with every extra traveller.

FAQ

Is it cheaper to buy a SIM after I arrive in Vietnam?

Slightly, but not by much. Buying locally means queuing, finding a shop, and the risk of a language gap leaving you with the wrong plan — or paying more than you should. Buying before you fly usually costs a little more but means you are connected the moment you land, which is worth more than the small saving when you are standing in an unfamiliar airport trying to order a car.

Which phones support eSIM?

Broadly, iPhone XR/XS and later, and a range of flagship Android phones — Samsung Galaxy S20 series, Google Pixel 3 series and newer, among others. Check your specific model before buying, because an eSIM you cannot install is money wasted.

What happens if I run out of data?

You usually have three options. Most carriers let you top up through their website or app, or at a local shop. Some plans are unlimited but throttled — once the high-speed allowance is gone the connection slows down, though messaging and maps generally still work. If your card cannot be topped up, you would need to buy a new SIM or eSIM. If you expect to stream video or send a lot of photos, an unlimited plan is worth the extra up front.