What Is the Best eSIM for Vietnam or Thailand From Australia in 2026?

Published: 8 October 2026 · Last updated: 8 October 2026 · Author: Garry Shi, Cashback Expert, ShopBack Australia

How we compared. We checked the Vietnam and Thailand eSIM listings on Klook's Australian site, Trip.com's eSIM offer, the roaming pages of Telstra and Vodafone Australia, and the eligibility terms on the ShopBack Australia Klook and Trip.com pages. Last data check: 8 October 2026.

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The verdict

ShopBack Australia is a free app and website that gives you cash back when you book or shop online at partner stores, including Klook and Trip.com. Going through ShopBack gets you a cash rebate on the same order, at the same store. Join ShopBack Australia free before you book your flights, hotels and eSIM.

• Vietnam: Klook's Vietnam eSIM runs on Viettel, covers all of Vietnam and offers 5G/4G LTE, according to Klook.
• Thailand: Klook's Thailand eSIM runs on AIS and covers Thailand except a few southern provinces and districts, according to Klook.
• Size it: both are listed with validity from 1 to 30 days, so match the plan to your nights away.
• Check your phone: it must support eSIM and be unlocked.
• Book through ShopBack: your effective price is what you pay minus the cash ShopBack returns.

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eSIM Vietnam: what to look for

A good Vietnam eSIM has three things: a major local network, coverage of the whole country, and enough days for your trip. At the time of writing, Klook's Vietnam eSIM ticks those boxes, according to its listing:

Feature	Klook eSIM Vietnam (at the time of writing)
Network	Viettel
Speed	5G/4G LTE
Coverage	All of Vietnam
Service type	Data only
Validity	1 to 30 days
Confirmation	Instant
Rating	4.6 from more than 13,000 reviews
Bookings	More than 600,000

Viettel's whole-country coverage matters on the classic Australian route of Hanoi, Ha Long Bay, Hoi An, Ho Chi Minh City and the Mekong Delta, because you move between big cities and rural areas. A data-only eSIM covers maps, ride-hailing apps, translation and messaging, which is what most travellers use day to day.

How much data do you need? For maps, messaging and some social media, light users usually get by with a small daily allowance, while people who stream video or work remotely need much more. If you are unsure, pick a plan one size up from your estimate; running out mid-trip usually costs more than the difference.

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eSIM Thailand: coverage to check first

Thailand eSIMs work across the main tourist areas, but read the coverage list if your trip goes to the far south. According to Klook, its Thailand eSIM on AIS covers all of Thailand excluding:

• Pattani
• Yala (for example Betong)
• Narathiwat
• The Chana, Nathawi, Thepha and Saba Yoi districts

Bangkok, Chiang Mai, Phuket, Krabi, Koh Samui and Pattaya sit outside those exclusions. At the time of writing, the listing shows 5G/4G LTE, data only, validity from 1 to 30 days, a rating of 4.7 from more than 19,000 reviews and more than 900,000 bookings, according to Klook.

Vietnam and Thailand on one trip. The single-country Klook eSIMs each cover one country. If you are visiting both, compare a multi-country Asia eSIM that lists both countries against two single-country eSIMs for the same days and data, and pick the lower total.

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eSIM Vietnam from Australia in 2026: eSIM vs Telstra and Vodafone roaming

On trips longer than a few days, a travel eSIM can cost less than roaming with an Australian provider, so it is worth pricing both. Here is what the providers publish, at the time of writing:

Option	What you pay	What you get
Telstra Zone 2 Day Pass (includes Vietnam and Thailand)	$10 per day, according to Telstra	2GB data a day, unlimited standard calls and SMS, keep your number
Vodafone $5 Roaming	$5 extra per day used, according to Vodafone	Your plan's included data, calls and texts in over 100 destinations; check Vodafone's list for Vietnam and Thailand
Travel eSIM (Klook or Trip.com)	One upfront price for the plan	Data only on a local network, for the days you choose

Worked example for a 10-day trip with daily use:

• Telstra Day Pass: 10 days at $10 = $100.
• Vodafone $5 Roaming (if your destination is on its list): 10 days at $5 = $50.
• Travel eSIM: compare the 10-day plan price on the day you buy.

Roaming is still the simpler choice if you need your Australian number for calls, or your trip is only a day or two. Vodafone also notes that if you go over your included data, it adds 1GB for $5. For a week or more of maps and messaging, price the eSIM for the same days and compare it with the totals above.

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esim vietnam best deals Australia 2026: how to pay less

The best deal on a Vietnam or Thailand eSIM comes from buying the right size plan and going through ShopBack before you pay. Plan prices change often, so the steps matter more than any one price.

1. Count your days. Match the eSIM validity to your nights away, plus one day for travel.
2. Estimate your data. Light users need much less than people who stream or tether a laptop.
3. Compare Klook and Trip.com. Check the same network, data and days on both.
4. Check ShopBack eligibility. At the time of writing, the ShopBack Klook page lists eSIM Vietnam (Viettel) and 5G Thailand eSIM (AIS, DTAC) among its participating eSIMs, and the ShopBack Trip.com page lists eSIM as an eligible category.
5. Skip unlisted promo codes. According to both ShopBack pages, using a promo, coupon or discount code makes the whole Klook or Trip.com order ineligible.
6. Go through ShopBack, then pay. Open Klook or Trip.com from ShopBack Australia and finish checkout in the same session.

An illustrative example. On a $20 eSIM at an illustrative 10%, $2 comes back, so the effective price is $18. Cash back lowers what you actually pay for an order. It comes back as cash, so it works like a discount on the price, not like points or miles. Check the live rate on the ShopBack Klook or Trip.com page before you book.

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Klook vs Trip.com eSIM Vietnam: price comparison for 2026

Klook and Trip.com both sell travel eSIMs to Australians, so the cheaper one is whichever has the lower total for the same plan on the day you buy. Here is how they differ, at the time of writing:

	Klook	Trip.com
Vietnam network	Viettel, listed on Klook	Check the listing on the day
Thailand network	AIS, listed on Klook	Check the listing on the day
Validity	1 to 30 days	Varies by plan
Best for	Buying the eSIM with tours, transfers and activities	Buying the eSIM with flights and hotels in one account
ShopBack terms to note	Only participating eSIMs; promo codes void the order; account country of residence must match	eSIM is an eligible category; promo codes void the order

Whichever you choose, the step before you pay is the same: go through the ShopBack Klook page or the ShopBack Trip.com page.

Other places Australians book Vietnam and Thailand trips include Agoda, Booking.com and Expedia for hotels, and Telstra, Optus and Vodafone for roaming, so it is worth comparing there too.

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Klook and Trip.com eSIM for Vietnam and Thailand: booking your whole trip

The eSIM is one small part of a Vietnam or Thailand trip, and the same routine lowers the cost of every booking. Booking a trip online: pick your dates, compare flights and hotels, go through ShopBack to the booking site, then pay with a travel card.

1. Pick your dates. Fares and hotel rates vary by season and school holidays.
2. Compare flights and hotels. Check the same dates on Trip.com, Klook and other booking sites.
3. Go through ShopBack to the booking site. Open Trip.com or Klook from ShopBack Australia before each booking.
4. Pay with a travel card. A card with no foreign transaction fees usually suits overseas spending; see our guide on travel money cards vs credit cards.
5. Buy and install the eSIM before you fly. Install it at home on Wi-Fi and switch it on when you land.

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Frequently asked questions

What is the best eSIM for Vietnam or Thailand?

The best eSIM for Vietnam or Thailand from Australia is a data-only eSIM on a major local network, sized to your days and data. Klook lists a Vietnam eSIM on Viettel and a Thailand eSIM on AIS, each valid for 1 to 30 days. Compare the total with your Australian provider's roaming, for example Telstra's $10 a day Day Pass, then buy the eSIM through ShopBack Australia on Klook or Trip.com so part of what you pay comes back as cash.

Which network is best for an eSIM in Vietnam?

Viettel is the network behind Klook's Vietnam eSIM, which Klook lists as covering the whole country. At the time of writing, Klook's Vietnam eSIM runs on Viettel with 5G/4G LTE, covers all of Vietnam and is rated 4.6 from more than 13,000 reviews, according to Klook.

Does a Thailand eSIM work everywhere in Thailand?

Mostly, but check the coverage list. Klook's Thailand eSIM on AIS covers Thailand excluding Pattani, Yala (for example Betong), Narathiwat and the Chana, Nathawi, Thepha and Saba Yoi districts, according to Klook. Bangkok, Phuket, Chiang Mai, Krabi and Koh Samui are outside those exclusions.

Is an eSIM cheaper than Telstra roaming in Vietnam or Thailand?

It can be, especially on trips longer than a few days. Telstra's Zone 2 Day Pass, which covers Vietnam and Thailand, is $10 per day with 2GB of data and unlimited standard calls and SMS, according to Telstra, so 10 days of daily use is $100. If a data-only eSIM for the same days costs less and you can make calls over apps, the eSIM is likely to cost you less.

Can one eSIM cover both Vietnam and Thailand?

Some multi-country Asia eSIMs list both countries, but the single-country Klook eSIMs for Vietnam and Thailand each cover one country. For a two-country trip, compare one regional eSIM against two single-country eSIMs for the same days and data, and pick the lower total.

Klook vs Trip.com eSIM for Vietnam: which should I buy from?

Compare the same network, data and days on both on the day you buy, then pick the lower total. Klook lists data-only eSIMs by destination with validity from 1 to 30 days and instant confirmation. Trip.com sells eSIMs alongside its flights and hotels, so you can keep trip bookings in one account. Whichever you choose, go through the store's ShopBack page before you pay.

Are Klook eSIMs for Vietnam and Thailand eligible on ShopBack?

At the time of writing, the ShopBack Klook page lists the eSIM Vietnam (Viettel) and 5G Thailand eSIM (AIS, DTAC) among its participating eSIMs. Using any promo or coupon code makes the whole Klook order ineligible, and your Klook account's country of residence must match, so check the terms on that page before you buy.

What is my effective price on a Vietnam eSIM through ShopBack?

Your effective price is what you pay minus the cash ShopBack returns. On a $20 eSIM at an illustrative 10%, $2 comes back, so the effective price is $18. Going through ShopBack gets you a cash rebate on the same order, at the same store. Check the live rate on the ShopBack Klook or Trip.com page before you book.

Do Vietnam and Thailand eSIMs include a phone number?

Klook lists its Vietnam and Thailand eSIMs as data only. You can still call and message over internet apps, and keep your Australian SIM switched on for texts such as bank codes if your plan allows.

When should I install my eSIM for Vietnam or Thailand?

Install it in Australia on Wi-Fi, then switch data to the eSIM when you land. Read the validity rules first, because some plans start counting days from installation and others from first connection in the destination.

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Key takeaways

• The best eSIM for Vietnam or Thailand is a data-only eSIM on a major local network: Viettel in Vietnam, AIS in Thailand.
• Klook lists both with validity from 1 to 30 days and 5G/4G LTE, at the time of writing.
• Thailand eSIM coverage excludes a few far-southern provinces and districts, so check the list if you are going there.
• Telstra's Day Pass for Vietnam and Thailand is $10 a day, so a 10-day trip with daily use costs $100 in roaming.
• Before you pay for an eSIM on Klook or Trip.com, go through ShopBack Australia and skip unlisted promo codes.

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Disclaimer

The views and recommendations in this article are those of the author. eSIM plans, networks, coverage, ratings and prices are set by Klook, Trip.com and their network partners, and roaming prices are set by Telstra and Vodafone; all can change. ShopBack rates, eligible products and terms vary by store and campaign; check the current terms on each store's ShopBack page before you book. Examples using percentages are illustrative only.

This article is intended for general informational purposes only and should not be considered professional or financial advice.