eSIM for Hoi An

Price: from $1.29
Data: 100 MB – 50 GB or unlimited
Validity: 1–180 days
Speed: 4G LTE / 5G
Host networks: MobiFone, Viettel Mobile, Vinaphone
Coverage: Hoi An

Select your planIn stock

Duration

Choose your package

Quantity

Unlimited data · 3 Days$4.79

Unlimited data · 3 Days ×1

$4.79

Going to more than one country? See regional plans

Does my phone take an eSIM? Check now

Dial *#06# on your phone. If you see an EID number, your phone takes an eSIM. Most phones sold since 2019 do.

Not sure it works on your phone? Check compatibility

Install before you fly

How do you install and activate it?

1
Buy before you fly
Pick a country and a data size; pay with Apple Pay, Google Pay or card.
2
Open the email
Your QR code arrives in minutes. Scan it while you still have wifi.
3
Land connected
Switch data to Viasimo on arrival. Your own number keeps working for calls.

Network

Which networks does the Hoi An eSIM use?

Host networks: MobiFone / Viettel Mobile / Vinaphone

Your eSIM picks one automatically; you do not choose or switch between them.

Data: 100 MB – 50 GB or unlimited
Validity: 1–180 days
Speed: 4G LTE / 5G
Hotspot / tethering: Supported on most devices
Activation: Starts when you first connect in your destination
Speed management: Full speed to the plan's limit, then 512 Kbps
Top-ups: Add more data from your account, before the plan expires
Text messages (SMS): Data only: use an app for verification codes
Connects via: Hong Kong
Unused validity: 180 days before it must be installed

Choosing a plan

How much data do you need?

The allowances below are our sizing recommendations, not measurements. The plan beside each one is the cheapest option on this page that covers it.

Recommended data allowances matched to the plans sold for this destination
You are	Plan for	Cheapest plan that covers it
LightMaps, messaging and the occasional lookup	About 1 GB a week	$1.791 GB, 7 days
TypicalMaps, social, photos and some browsing	About 3 to 7 GB a week	$7.005 GB, 30 days
HeavyVideo streaming, video calls and uploads	10 GB a week or more	$10.99Unlimited, 7 days
Working or sharingTethering a laptop, calls and cloud sync	20 GB a week or more	$10.99Unlimited, 7 days

Work it out from your own habits

What a week abroad costs

eSIM, local SIM or roaming?

Charged per day

Your carrier roaming

Queue and plastic

A SIM at the airport

$1.29

Viasimo, one bundle

Only the Viasimo figure is a price: it comes from today’s live catalog. The other two rows are directional, not quoted rates.

About this eSIM

A Hoi An eSIM keeps you online across Vietnam the moment you arrive, with no roaming fees and setup in a single tap. This riverside town is covered by solid 4G, so you stay connected wandering the lantern-lit Ancient Town, crossing the Japanese Covered Bridge, browsing the tailor shops and cycling out to An Bang Beach. Signal holds from the town centre along the roads toward Da Nang and the coast, so rideshare, maps and translation apps are ready from your very first minute exploring the old streets.

Hoi An is compact, so you find reliable coverage right through the Ancient Town, along the riverside, and around the central lantern-lit streets. It can drop as you head out toward the rice paddies, the quieter beach roads, and the rural surrounds. Set the eSIM up before you travel so it is live when you arrive, and keep your home number on for calls. Handy tip: download a map of the walking area, since the old town is an easy maze to lose track of.

Unlimited runs at full speed up to a fair-use limit, then continues slower.

Before you buy

Important to know

This is a data-only eSIM. It carries no calls or SMS on its own number.
Your existing number stays on your primary SIM, so calls and verification texts keep working.
Your phone must support eSIM, and some carrier-locked phones cannot install one.
Signal varies with location, terrain, congestion and your handset. Dense urban areas are consistently better served than remote ones.
5G only works where the host network has deployed it and your phone supports it. Everywhere else it falls back to 4G LTE.
The eSIM selects a host network automatically. You cannot pick or switch between them.
Unlimited plans run at full speed up to a fair-use limit, then continue at a reduced speed. Read the fair usage policy

Looking for more information?

Frequently asked questions

Does an eSIM work in Hoi An?

Yes. Your Vietnam eSIM connects automatically the moment you arrive, with no roaming fees and nothing to set up at the airport. The host networks it can use are MobiFone, Viettel Mobile, Vinaphone. Coverage runs on 4G LTE and 5G where the network has rolled it out, and falls back to 4G elsewhere.

Do I get 5G in Hoi An?

Yes, where it has been deployed. 5G runs on MobiFone, Viettel Mobile, Vinaphone in Vietnam, and your eSIM uses it automatically on a 5G-capable phone, dropping back to 4G LTE outside covered areas. No country is covered everywhere, so 5G availability varies by location.

How much data do I need for Hoi An?

These are Viasimo's sizing recommendations, not measurements of your trip. Maps, messaging and the occasional lookup run to roughly 1GB a week. Streaming, video calls or tethering a laptop push that to 3-5GB a week, and uploading photos and video moves past it faster still. The data calculator on this site works it out from how you actually use your phone. Sizing one tier up costs less than topping up part-way through a trip.

Is an eSIM cheaper than roaming in Hoi An?

Usually, though it depends on your own carrier. A roaming day-pass is charged for each day it is active whether you use the data or not, while a prepaid bundle is one up-front purchase for a fixed amount of data. The gap widens on longer trips. Check your carrier's published rate for Hoi An before you fly rather than taking our word for it.

How do I install my eSIM?

After checkout we email you a QR code. On your phone, open Settings, then Cellular or Mobile data, tap Add eSIM, and scan the code. Installation takes under a minute.

When does my Hoi An eSIM activate?

Your plan activates automatically when you arrive and connect to a local network, so your validity period only starts once you land.

Can I keep my regular number?

Yes. The eSIM is data-only and runs alongside your physical SIM, so you keep your home number for calls and texts while using Viasimo for data.

Can I top up or extend my plan?

Yes. You can buy more data or extend your plan at any time from your account before it expires.

Does it support hotspot and tethering?

Tethering is supported on most devices, so you can share your connection with a laptop or other devices.

Where this comes from

Information and verification

Each block below says what was checked and when. Anything we cannot date, we do not claim.

Prices and plans: Every price and allowance on this page is read from the live catalog, not typed in.; Verified September 15, 2026
Host networks: The operator list comes from the network partner that carries this eSIM.; Verified September 15, 2026