One eSIM for Southeast Asia: Thailand, Vietnam, Bali and Singapore

One eSIM for Southeast Asia can cover the whole trip. Thailand, Vietnam, Bali and Singapore, in some order, is about as close to a classic Kiwi Southeast Asia route as it gets - whether it's a three-week backpacker loop or a shorter multi-city break. Buying a local SIM (or a separate eSIM) at every border means repeating the same setup three or four times on one trip. Here's what one SweetAsSIM eSIM covering the whole region actually costs against buying per country, using real current pricing rather than a vague "check regional bundles" line.

One note on naming: Bali isn't its own eSIM here - it's covered under the Indonesia eSIM, along with the rest of the country. If Bali is the whole trip rather than one stop on a wider loop, see the dedicated Bali guide instead.

Who this is for

Anyone doing more than one stop on the Southeast Asia circuit rather than staying in a single country - the backpacker route through Thailand and Vietnam with a Bali or Singapore leg tacked on, a shorter two-week break splitting time between Bangkok and Bali, or a business-plus-holiday trip through Singapore and one or two neighbours. Sticking to just one of the four for the whole trip, a single country plan is still the simpler pick - see below.

How much data a multi-stop SEA trip actually needs

Across a trip like this you're leaning on maps and messaging in unfamiliar cities, translation apps at street food stalls, and probably more photo and video uploads than a single-destination holiday. As a rough guide, light use (maps and messaging only) sits around 1-3GB a week, regular use with some streaming and video calls home lands around 5-10GB a week, and heavy daily streaming or hotspotting a laptop pushes toward 15-20GB+ a week - see how much data you actually need for the full breakdown. A longer, multi-country trip is exactly where it pays to size a little larger rather than run out mid-loop.

One regional bundle, or four separate country plans?

There are 4 regional bundles that cover Thailand, Vietnam, Indonesia and Singapore all at once - the cheapest is Asia · 20 countries, starting from $9.99. Against that, buying separately per country for a 21-day trip split roughly evenly across all four (about 5 days each, sized for regular use) works out to around $42.96 total across four separate plans - plus juggling four eSIMs and remembering which one is active where. One bundle at $99.99 for the 21-day trip is both simpler and, on these numbers, the cheaper option too. See the regional bundles to check the current line-up and country list for yourself.

The four stops, one by one

• Thailand - Bangkok, Chiang Mai and the islands, and one of the most visited countries in the region on its own. Coverage is excellent across Thailand's cities, beaches and main tourist trail - Bangkok, Chiang Mai, Phuket and Pattaya are all well covered. See Thailand eSIM plans (or the dedicated Thailand guide for a Thailand-only trip).
• Vietnam - Hanoi to Ho Chi Minh City and everywhere between. Cities, the coast and the main tourist trail are well covered across the board. See Vietnam eSIM plans (or the dedicated Vietnam guide for a Vietnam-only trip).
• Indonesia (Bali included) - Bali especially, a long-running favourite for Kiwi holidays, plus the rest of Indonesia on the same eSIM. Java and Bali are well covered, and signal reaches the main towns and routes of the outer islands like Sumatra, Kalimantan and Sulawesi too. See Indonesia eSIM plans (or the dedicated Bali guide for a Bali-only trip).
• Singapore - often a stopover or short stay on the way to or from the rest of the region. Singapore's networks are dense and modern across a city-state you can drive end to end in under an hour - there's no real "rural" here, so you're covered wherever you go, from Sentosa to the far reaches of the MRT. See Singapore eSIM plans.

When does it actually start?

Check the "About this eSIM" panel on the plan page before you buy - most plans (regional bundles included) start the first moment your phone connects to a network at your first stop, so it's fine to buy well ahead of the trip. A handful of plans instead start the moment you install the eSIM profile, so for those, install right before you fly rather than weeks ahead.

Does hotspotting work?

Yes - hotspot/tethering is included on both country plans and regional bundles, so you can share the connection with a laptop or another device. It counts against your plan's data allowance like any other use, so factor that into the sizing above if you're planning to work from a laptop at any point on the loop.

Arrival cards to sort at each border

A multi-country Southeast Asia trip means a few online arrival forms, and each wants filling in shortly before you land: Thailand's Digital Arrival Card (TDAC), Malaysia's MDAC and Singapore's SG Arrival Card are all due within the three days before arrival. With one eSIM already working, you can fill each one in on the bus or at the airport gate rather than hunting for Wi-Fi - and they're free, so skip any paid lookalike sites.

Setting it up

Install your eSIM on Wi-Fi before you fly - it doesn't use data to install, and it's ready to go the moment you land at your first stop. See the setup guide for the two-minute version. One eSIM installed once beats finding a SIM shop or a new QR code at every border.

Southeast Asia eSIM FAQs

Ready to sort it? Compare the regional bundles against the per-country pages - Thailand, Vietnam, Indonesia and Singapore - and pick whichever comes out cheaper and simpler for your actual route.