Best eSIM for Southeast Asia (2026): One Plan for Thailand, Vietnam, Singapore and the Philippines

The best eSIM for Southeast Asia is the one whose country list matches your route. Wayfarro's regional plan covers Thailand, Vietnam, the Philippines, Singapore and China, with 10GB for 30 days at $31 and 7 days of unlimited at $30. Airalo's Asia plan lists 18 countries and charges $26 for 7 days of unlimited. Wayfarro's prices come straight from its store; Airalo's were checked in October 2026.

Airalo is cheaper on every unlimited length. Wayfarro is the one selling fixed-data plans for the region, from 1GB to 100GB, and the only one with a 1-day plan. Neither regional plan covers Malaysia or Bali, so most trips end up as a regional plan plus one country plan.

Best eSIM for Southeast Asia: regional plans compared

These are regional plans, taken from each provider's own regional page and confirmed in US dollars. Nomad didn't have a Southeast Asia or Asia regional page we could read, so it's not in this table. Providers change prices and run sales often, so check before you buy.

Plan	Wayfarro South East Asia	Airalo Asia
1GB · 7 days	$7	—
3GB · 30 days	$15	—
5GB · 30 days	$20	—
10GB · 30 days	$31	—
20GB · 30 days	$48	—
50GB · 30 days	$105	—
Unlimited · 1 day	$7	—
Unlimited · 3 days	$14	$11.50
Unlimited · 5 days	$22	$19
Unlimited · 7 days	$30	$26
Unlimited · 10 days	$42	$35
Unlimited · 15 days	$62	$49
Unlimited · 30 days	$121	$73.50
Countries covered	5	18
Networks	AIS, Viettel, Globe, Singtel	not named on the plan page

How to read this table: Airalo is cheaper than Wayfarro at every unlimited length, and the gap grows with the number of days. Wayfarro is the only one here with fixed-data plans and a 1-day plan, and it names the network you'll be on in each country. A dash means the provider doesn't sell that exact plan, or we couldn't confirm its US-dollar price. Airalo's Asia page only listed unlimited plans when we checked.

Wayfarro's unlimited rows are its Unlimited Lite plans: 1GB a day at full speed, then 512 kbps until the next day. It also sells Unlimited Essential (1GB a day, then 1.25 Mbps) and Unlimited Plus (2GB a day, then 2 Mbps). Seven days costs $36 on Essential and $71 on Plus.

Check the country list before the price

"Southeast Asia" means something different on every provider's site. Wayfarro's plan is Thailand, Vietnam, the Philippines, Singapore and China. Airalo's Asia plan says 18 countries and networks but doesn't list them on the plan page, so open the coverage list before you pay.

The countries most people assume are included, and often aren't:

• Malaysia: Not on Wayfarro's regional list. If you're crossing from Singapore to Johor Bahru or flying into KL, add a Malaysia plan. Wayfarro's Malaysia guide covers the options.
• Indonesia and Bali: Not on Wayfarro's regional list either. Bali is its own trip for most people, and the Bali guide on this site compares the single-country plans.
• Cambodia and Laos: Not covered by Wayfarro's regional plan. Both are sold as single-country plans, so a Bangkok–Siem Reap–Hanoi loop is the regional plan plus a Cambodia plan.
• China: On Wayfarro's list, which is unusual for a Southeast Asia plan and useful if your route starts or ends on the mainland.

The easiest way to handle the gaps is the Trip Builder: put every country on one order and it works out which regional plan and which country plans you need.

The networks you'll land on

Wayfarro's regional plan runs on AIS, Viettel, Globe and Singtel, which are the networks locals recommend in each country. Why that matters, country by country:

• Thailand (AIS): Thailand's two big groups are AIS and True, which merged with dtac in March 2023. Travel guides and island locals point to AIS for the mountains around Chiang Rai and for the Gulf islands, where it holds the Koh Samui–Koh Phangan ferry crossing when the others drop out.
• Vietnam (Viettel): Viettel is the largest of Vietnam's three carriers and the usual recommendation for the Ha Giang loop, Cao Bang and Sapa. Expect dead spots in deep valleys and on high passes on any network.
• Philippines (Globe): Globe and Smart are the two national networks, and Globe reported 63.1 million subscribers in November 2025. Island coverage is good in towns and resort strips and thin on boats and small islands.
• Singapore (Singtel): Singtel is the state-controlled incumbent, and Singapore is small and dense enough that coverage is a non-issue.

Airalo's Asia plan page didn't name its networks when we checked.

What "unlimited" means on a regional plan

Every unlimited travel eSIM has a fair-use policy. After a set amount of high-speed data each day, your speed drops until the next day. Wayfarro publishes its limits on the plan page: 1GB a day on Lite and Essential, 2GB a day on Plus, then 512 kbps, 1.25 Mbps or 2 Mbps for the rest of that day. Airalo's Asia page didn't state a daily limit or a throttled speed when we checked, so read the plan terms before you buy.

On a long trip the daily reset matters more than the headline. 512 kbps still runs Google Maps, Grab, WhatsApp and a hostel group chat. It won't upload a day's video from Ha Long Bay, so if that's you, either Unlimited Plus with 2GB a day or a 50GB fixed plan is the better buy. Wayfarro allows hotspot on every plan, and you can top up a fixed plan without reinstalling.

Which is the best eSIM for Southeast Asia for your route?

Match the plan to the route:

• Two weeks, Thailand and Vietnam: 10GB for 30 days at $31 covers maps, messaging and photos for most people, with top-ups if you run low. For unlimited, Airalo's 15 days at $49 beats Wayfarro's $62.
• A week of city hopping, Singapore to Bangkok to Manila: 7 days unlimited is $26 at Airalo and $30 at Wayfarro. If you'd rather count, Wayfarro's 5GB at $20 is enough for a week of light use.
• A month on the banana-pancake trail: 20GB at $48 for moderate use, 50GB at $105 if you work from cafés. Airalo's 30-day unlimited at $73.50 is well under Wayfarro's $121 if you'd rather not count.
• A one-day stop in Singapore or Bangkok: Wayfarro's 1-day unlimited is $7 and nobody else here sells a 1-day plan.
• Route includes Malaysia, Bali, Cambodia or Laos: The regional plan plus a country plan, on one order in the Trip Builder. That combination is the best eSIM for Southeast Asia trips that don't stick to the big four.
• Only one country: Skip the regional plan. A single-country plan, like the ones in the Thailand guide, costs less for the same data.

How to set up a Southeast Asia eSIM

Install at home, switch it on when you land, and leave it on at every border. It takes a couple of minutes:

1. Check your phone is unlocked and supports eSIM. iPhone XS and later, Google Pixel 3 and later, and most recent Samsung Galaxy phones do.
2. Install over Wi-Fi before you fly. Scan the QR code or use the one-tap install link. The step-by-step install guide covers iPhone and Android.
3. Label it "SE Asia" so you can find it in settings.
4. When you land, set the regional eSIM as your mobile-data line and turn on Data Roaming for it. Travel eSIMs are roaming profiles, so data won't connect without this.
5. At each border, do nothing. The eSIM picks up the local partner network on its own. If it doesn't within a few minutes, toggle airplane mode.
6. Keep your home SIM on for calls and texts with its own data roaming off, so bank verification codes still arrive.

Wayfarro's validity starts when the eSIM first connects in any covered country, not when you install it.

Crossing borders in Southeast Asia with one eSIM

The regional plan earns its keep at the land borders and on the short hops. Bangkok to Siem Reap by bus, Hanoi to Hue by sleeper train, Singapore to Bangkok on a budget airline: each would mean a new airport SIM counter and a passport registration with a local SIM. The Philippines and Singapore both make local SIM buyers register with a passport, and airport SIM counters across the region are slow for the same reason. A roaming eSIM skips that at every border.

Some things worth knowing on the ground:

• Grab is everywhere on this route and needs a live connection to book, so a plan that slows down is better than one that stops.
• Overnight trains and buses in Vietnam and Thailand lose signal for long stretches in the countryside on every network. Download offline maps and your onward bookings before you board.
• Islands and boats: Thai Gulf islands, the Philippine Visayas and Ha Long Bay all have gaps on the water. AIS and Globe hold up better than most, but no network covers open water.
• Free Wi-Fi: Hostels, malls and coffee chains have it. Night markets, bus stations and beach bungalows mostly don't.

Bottom line

Airalo is cheaper for unlimited data across the region. Wayfarro is the best eSIM for Southeast Asia if you want fixed data, a 1-day plan, named local networks, or one order that also covers the countries the regional plan leaves out. Either way, read the country list first: Malaysia and Bali are usually the gap. See Wayfarro's South East Asia eSIM plans, or build the whole route, country plans included, in the Trip Builder.