What is a Southeast Asia eSIM?

A Southeast Asia eSIM is a digital SIM that lets you use mobile data across all countries in Southeast Asia on a single plan — no physical SIM swapping required. You scan a QR code to activate it before your trip.

How many countries does the Southeast Asia eSIM cover?

The Onetel Southeast Asia eSIM covers all major countries across the region. You can browse our plan selector to see exactly which countries are included.

Can I use the same eSIM across multiple countries in Southeast Asia?

Yes. One Southeast Asia eSIM plan works seamlessly across all covered countries in the region. Your data pool is shared — no need to buy a new SIM each time you cross a border.

How do I install and activate a Southeast Asia eSIM?

After purchase, you receive a QR code by email. Open your phone's Settings → Cellular/Mobile → Add eSIM, and scan the code. Activation takes under 2 minutes and you can do it before you travel.

Is there a refund policy for Southeast Asia eSIM plans?

Yes. If your eSIM has not been activated, you can request a full refund within 30 days of purchase. Contact Onetel support and we'll process it promptly.

🗺️ Regional plan · Several countries

eSIM for Southeast Asia

A single eSIM works in every country in Southeast Asia
Cross borders without changing SIMs
QR code arrives instantly — set up before takeoff
Built for road trips & multi-stop tours
Zero roaming charges inside Southeast Asia

Get unlimited data running in Southeast Asia

How many days

More days, lower per-day rate.

How many eSIMs

How many people?

Total

—

Get Southeast Asia eSIM

Set it up at home, or after you land. The plan only starts counting when you reach your destination and switch the eSIM on.

* The "as low as" figure is the lowest per-day rate, taken from the longest unlimited data plan we sell.

Safe Checkout

26+ countries covered | 1 eSIM — no SIM to swap | Instant Sent as a QR code | 4G/5G where available

Quick, steady data right across Southeast Asia

Video calls that hold up in every country in Southeast Asia
Live Google Maps in every city you drive through
Photos uploaded from the road in seconds
Music and podcasts on every leg of the trip

4G LTE service in Southeast Asia · 5G in select areas

Instagram

Maps by Google

Spotify

Translate by Google

TikTok

Grab your Southeast Asia eSIM set up in 3 steps

No shop queue. No plastic SIM. Any eSIM-compatible phone will do.

Pick your data plan

Match a plan to your Southeast Asia trip — Unlimited or Fixed GB.

Set up your eSIM

We email a QR code. Scan it before you leave — under 2 minutes on any eSIM phone.

Use it anywhere in Southeast Asia

Drive over a border and nothing changes. The eSIM picks up a network in every covered country by itself.

Why go with a Southeast Asia eSIM?

Works across borders

Data in every country across Southeast Asia on one eSIM — no plan switching.

Activates on the spot

Scan the QR code before you fly. You land already connected.

Cheaper than roaming

A regional plan costs less than buying a plan per country. Roaming costs more than both.

Works as a second SIM

Your home number stays live. The eSIM handles data only — nothing given up.

24/7 support

Support runs around the clock, for installs and for anything that stops working.

Always delivered

Sent digitally, straight away — no plastic SIM, no waiting.

Why buy from us?

Here's how Onetel stacks up for your Southeast Asia trip.

Onetel

A separate SIM in each country

Roaming

A single plan covering all Southeast Asia countries

No SIM swapping at borders

Unlimited data available

QR code sent right away

One price, no extras

Support answers any hour

Refund guarantee

🗺️

Southeast Asia What plans cost

Prices shown in USD

Duration	Data	Price	Daily rate
1 day	500 MB	$3.34	$3.34/day
3 days	—	$5.56	$1.85/day
5 days	—	$8.28	$1.66/day
7 days	1 GB	$11.02	$1.57/day
10 days	—	$15.09	$1.51/day
15 days	2 GB	$21.91	$1.46/day
30 days	1 GB	$42.36	$1.41/day
90 days	20 GB	$56.70	$0.63/day
180 days	50 GB	$120.15	$0.67/day

24/7 Support

Questions? Talk to a human.

Common questions about Southeast Asia coverage, phone compatibility, or anything else — someone is on support around the clock.

Talk to us

Common Questions

The details worth knowing about your Southeast Asia eSIM

A Southeast Asia eSIM is one digital SIM that works in multiple countries across Southeast Asia. Scan one QR code before you leave home. The same plan keeps working as you cross borders, in every covered country. No local SIM to buy at each stop, no queue at an airport kiosk, and no roaming charges from your carrier.

It depends on the plan tier. Our Southeast Asia plans cover the destinations people actually travel to in the region. Pick a plan in the booking card above and the plan detail page lists every country included. Check your stops against that list before you pay.

Yes. Install it at home over Wi-Fi and set it as your data SIM. The plan starts the first time your phone latches onto a supported local network. Nothing to configure on arrival. The validity countdown runs from first use, not from the day you paid.

Yes. The eSIM carries data and nothing else. Leave your physical SIM in the phone and switched on: calls and texts still land on your usual number while the eSIM does the data. That is what dual SIM is for.

Outside the covered list, the eSIM gets no signal. Your phone falls back to the physical SIM or shows no data at all. Crossing more than one region on the same trip? Buy the Global eSIM instead — it covers 150+ countries worldwide.

Yes. The plan moves with you across every covered country. Cross a border and the eSIM picks up the local network by itself. No settings to change, no restart.

We roam onto local carrier networks, so their coverage is your coverage. In cities and tourist areas it is usually excellent. Out in the countryside 4G can thin out and drop to 3G. Going somewhere remote for a while? Check the local carrier coverage maps for those areas first.

Hotspot works on most regional plans, so a laptop or tablet can run off your phone. On unlimited plans, tethered traffic may hit a fair-use speed cap. If tethering matters to you, read the plan specifics before you pay.

Plans run from 1 day up to 30 days. Pick the length that matches your itinerary. Validity begins when the plan first connects to a network in a covered country, so installing it a week early costs you nothing.

Yes. Out of data, or need extra days? Buy another plan from your Onetel account. The eSIM profile is already on your phone — add the new plan and it goes live straight away.

An eSIM is a programmable chip built into the phone at the factory. You download a carrier profile over the air instead of pushing a plastic card into a tray. Activation takes seconds, there is no tiny part to lose, and a dual-SIM phone can hold several plans at once.

Broadly, anything launched after 2018: iPhone XS and later, Google Pixel 3 and later, Samsung Galaxy S20 and later, plus most other Android flagships. The handset has to be carrier-unlocked. Open Settings, go to Mobile / Cellular, and look for "Add eSIM" or "Add Data Plan" — if it is there, you\'re compatible.

Settings → Mobile / Cellular → Add Plan; the exact wording depends on your OS. Then scan the QR code we email you. It takes under 2 minutes and needs Wi-Fi or an existing data connection, which is why doing it at home before the trip is easier.

No. It sits alongside your physical SIM as a separate profile. On most dual-SIM phones you point data at the eSIM and leave the physical SIM handling calls and texts. Several eSIM profiles can be stored at once, and you can switch between them whenever you want.

Yes, and it is the sensible way to do it. Install at home, set the eSIM as your travel data SIM, and you are online at the gate on arrival instead of hunting for airport Wi-Fi. The validity clock starts only when the eSIM connects to a network in a covered country, so an early install burns no days.

4G LTE is the floor on most plans. Where our carrier partners have deployed 5G and your handset supports it, you get 5G in those countries. Real speed depends on how busy the local network is and on your device\'s radio capabilities.

Onetel eSIM plans are data-only. Make calls and send messages over the data connection using WhatsApp, FaceTime, iMessage or Signal. Your physical SIM stays active for ordinary calls and texts on your home number.

Data stops. The eSIM profile stays on the phone. Log in to your Onetel account, buy a top-up or a new plan, and you are back online within minutes. The new plan switches on by itself on the same eSIM profile.

Yes, on most plans. With fixed-data plans you can usually push the whole allowance through a hotspot. Unlimited plans may cap hotspot traffic under fair use. The plan description sets out the tethering rules — read it before buying.

Yes. Same encryption standards as a plastic SIM. The profile is tied to your device\'s unique identifier (EID), so it cannot be cloned or moved to another handset. Lose the phone and the eSIM sits behind your phone\'s lock screen like everything else.

Onetel is a global eSIM marketplace. We pull plans from multiple carrier partners and put the best price for each destination in front of you. We are a travel-tech company with one aim: buying mobile data abroad should be as simple as buying a coffee. No contracts, no paperwork, instant delivery.

Yes. Payments run over industry-standard TLS encryption, and we take Visa, Mastercard, PayPal, Apple Pay and Google Pay. Full card details are never stored on our side. Thousands of travellers use Onetel to stay connected without the hassle, every month.

The QR code arrives instantly — usually within 10 seconds of payment clearing. It goes to your inbox and also sits in your Onetel account dashboard. Nothing there? Check the spam folder, then message our support team.

If the eSIM will not activate, or you have used no data at all, ask for a full refund within 30 days of purchase. Send support your order number and we process it promptly, usually within one business day. Plans that have been activated and used are non-refundable.

Yes. Raise the quantity at checkout. Everyone gets their own unique QR code, all delivered to the same email address. Large group? Contact us for a group pricing quote.

No. Every Onetel travel eSIM is a one-time purchase. No subscription, no renewal running quietly in the background, no charge you did not agree to. You decide what you buy and when you buy it.

Live chat is open 24/7 — the icon in the bottom-right corner of every page — and email works too. Chat replies typically come back within 2 minutes, emails within a few hours. If activation is failing right now, use chat.

Yes. A detailed VAT invoice is emailed to you after purchase. It shows your name, the plan bought and the amount paid — everything an expense claim needs.

Business accounts with consolidated billing and admin dashboards are in the works. Until then, save your payment details in your account for faster re-purchase and pull your full order history from the dashboard.

Support answers in English, with translation tools covering additional languages. More multilingual support is being added. Tell us which language you need help in and we\'ll do our best.

Southeast Asia · eSIM for Multiple Countries