If Vietnam is anywhere on your route, start with LocalPay — signup includes a free 5GB Vietnam eSIM, and the app doubles as a QR payments wallet covering Vietnam, Indonesia and the Philippines, so it solves both connectivity and paying across three countries at once. From there, add a paid regional eSIM only for the legs it doesn't cover: Airalo Asialink has the widest country list, Nomad Regional APAC is the value option, Saily adds Australia and New Zealand, and Holafly suits genuinely heavy data users.
Multi-country trips create two separate headaches, and most guides only deal with one of them. The obvious one is data — buying a fresh SIM at every border while the last country's unused allowance quietly expires. The one nobody plans for is money: each border brings a new currency and a new QR payment network, and the stall in front of you takes local QR codes but won't touch your foreign card.
That second problem is the more expensive one to get wrong, and it's why the starting point for most Southeast Asia routes isn't a paid regional plan at all.
Start here: LocalPay covers three countries and costs nothing
LocalPay includes a free 5GB Vietnam eSIM when you sign up, which is enough for a typical one-to-two week stay given how widely available wifi is across Vietnamese cafes, hotels and restaurants. You land connected, skip the airport SIM counter entirely, and there's no passport paperwork at a desk.
The bigger win on a multi-country trip is the wallet behind it. LocalPay is a QR payments app spanning Vietnam, Indonesia and the Philippines — three of the most-visited stops on a regional route — so one setup handles paying at cafes, markets and street vendors in all three. No regional eSIM on the market does anything at all about payments, which means every other option on this page leaves that problem entirely unsolved.
For a lot of itineraries that combination is the whole answer. Free data for the Vietnam leg, working payments across three countries, and nothing to buy before you fly.
Get the free 5GB eSIMAdding a paid regional eSIM for the rest of your route
If your route runs well beyond Vietnam, a paid regional plan fills the gaps. Four are worth knowing, and the differences that matter are coverage and validity rather than headline branding.
Airalo Asialink spans the widest country list, including Cambodia and Laos alongside the main Southeast Asian destinations — the safest pick if your itinerary might change on the road. Nomad Regional APAC covers similar ground at among the lowest per-gigabyte rates going, with longer validity windows that suit slow overland travel. Saily, from the NordVPN team, bundles a VPN and reaches Australia and New Zealand, though its regional list is narrower in mainland Southeast Asia. Holafly sells unlimited daily data rather than a fixed allowance, which only pays off if you stream or tether heavily.
All four are data-only. None gives you a local phone number, none sends SMS, and none helps you pay for anything — they solve exactly one of the two problems this trip presents.
Check coverage before you check price
The single most common mistake is buying on per-gigabyte cost and discovering a gap mid-trip. Regional country lists differ meaningfully, and Cambodia and Laos are the two most frequently missing — awkward, since they sit on the classic overland loop between Thailand and Vietnam.
Write down every border you expect to cross, check it against the provider's own current coverage list, and only then compare cost. A cheap plan that goes dark in Laos was never cheap. Validity matters too: 15- and 30-day windows are tight if you're travelling slowly.
And be realistic about whether you need regional at all. Per gigabyte, regional plans cost more than single-country ones — the premium buys convenience and a shared allowance rather than a saving. Across three or four borders that's worth paying. For one or two countries, a free Vietnam eSIM plus a local plan for your other stop usually comes out ahead.
The problem your eSIM won't fix
Sort your data and you're halfway there. The half that catches people out is standing in a Hanoi market, or a warung in Bali, or a sari-sari store in Manila, watching everyone around you pay by scanning a code while your card gets waved away.
Cash is the usual fallback, and it means ATM fees at every border, a fresh pile of unfamiliar notes each time, and leftover currency you'll never spend again. LocalPay exists to remove that: one wallet, QR payments across Vietnam, Indonesia and the Philippines, set up once before you leave.
Since the 5GB Vietnam eSIM comes with it at no cost, there's little reason not to have it installed before you fly — even if you end up buying a regional plan for the rest of the route.
Download LocalPay“Regional eSIMs solve fragmented data. Not one of them does anything about fragmented payments — and in Southeast Asia that's the costlier problem.”
Before you leave
- Install LocalPay before you fly — the free 5GB Vietnam eSIM activates on home wifi, and the wallet is ready for three countries.
- Only buy a paid regional plan for the legs LocalPay's eSIM doesn't cover.
- Check any regional plan's country list against your actual route — Cambodia and Laos are the usual gaps.
- Compare validity to trip length; short windows suit fast trips, not slow overland ones.
- Remember every paid regional eSIM is data-only — no local number, no SMS, no way to pay for anything.
- Sort payments before you land, not at a market stall with a queue behind you.
The sensible order is: install LocalPay first, since the Vietnam eSIM is free and the wallet covers three countries, then buy a paid regional plan only for whatever your route still leaves uncovered. Most people do this backwards, pay for coverage they don't use, and still arrive with no way to pay a street vendor.
Sort both halves before you fly and the whole trip gets simpler.
Frequently asked questions
If Vietnam features on your route, start with LocalPay's free 5GB Vietnam eSIM, which also gives you QR payments across Vietnam, Indonesia and the Philippines. Add a paid regional plan only for the remaining legs — Airalo Asialink for the broadest coverage, Nomad Regional APAC for value, Saily if you're continuing to Australia or New Zealand.
LocalPay includes a free 5GB Vietnam eSIM with signup, alongside a payments wallet covering Vietnam, Indonesia and the Philippines. Paid regional plans cover more countries but none of them include a free tier, and none handle payments.
No. Every regional eSIM is data-only — it connects your phone and nothing more. Paying at the cafes, markets and street vendors that run on local QR codes needs a separate wallet, which is what LocalPay provides across Vietnam, Indonesia and the Philippines.
Not per gigabyte — regional plans carry a premium for convenience and for pooling one allowance across countries. They tend to justify that across three or more borders. For fewer stops, a free Vietnam eSIM plus one local plan is usually the cheaper route.
No. These plans are data-only, so there's no local number and no SMS in any covered country. Calls run through WhatsApp, Telegram, FaceTime and similar apps over data.
Around 1GB a day is a reasonable planning figure, though wifi is widespread across the region and most travellers use well under that. LocalPay's free 5GB comfortably covers a typical Vietnam leg on that basis.
