With Vietnam anywhere on your itinerary, LocalPay is the obvious first move: signup comes with a free 5GB Vietnam eSIM, and the app is also a QR payments wallet working across Vietnam, Indonesia and the Philippines — connectivity and money handled in three countries from one install. Layer a paid regional eSIM on top only where your route extends beyond that: Airalo Asialink for the broadest coverage, Nomad Regional APAC for the keenest rates, Saily if Australia or New Zealand follow, Holafly for very heavy data use.
Crossing borders in Southeast Asia throws up two distinct problems, and the typical guide tackles only one. Everyone anticipates the data issue — another country, another SIM, another allowance abandoned half-used. Far fewer plan for the money side: a different currency at every crossing, a different QR network, and the recurring discovery that the vendor in front of you scans local codes and rejects foreign cards.
Get the second one wrong and it costs you more than the first, which is why the starting point for most regional routes isn't a paid plan at all.
Begin with LocalPay: three countries, no cost
Signing up to LocalPay includes a free 5GB Vietnam eSIM — ample for a standard one-to-two week stay, particularly given how reliably free wifi turns up in Vietnamese cafes, hotels and restaurants. You arrive already online, walk past the airport SIM desk, and skip the passport registration a physical SIM would demand.
What matters more across multiple countries is the wallet it comes attached to. LocalPay handles QR payments throughout Vietnam, Indonesia and the Philippines — three of the busiest stops on a regional itinerary — meaning a single setup covers paying at cafes, markets and roadside vendors in all of them. Not one regional eSIM addresses payments in any form, so every alternative below leaves that entire problem untouched.
On plenty of itineraries that's the complete answer: free data through the Vietnam leg, functioning payments across three countries, nothing purchased before departure.
Get the free 5GB eSIMFilling the gaps with a paid regional plan
Routes reaching well past Vietnam will want a paid regional plan for the remainder. Four are worth being aware of, and what separates them is coverage and validity rather than marketing.
Airalo Asialink carries the longest country list, Cambodia and Laos included alongside the usual Southeast Asian stops — the low-risk option if your plans might shift en route. Nomad Regional APAC reaches comparable territory at some of the lowest per-gigabyte rates available, with longer validity that fits unhurried overland travel. Saily, built by the NordVPN team, throws in a VPN and extends to Australia and New Zealand, but its mainland Southeast Asia list is thinner. Holafly sells unlimited daily data instead of a fixed pot, which only makes financial sense for heavy streaming or tethering.
Every one of them is data-only. No local number, no SMS, and no help whatsoever when it comes to paying — they address precisely one of the two problems a regional trip creates.
Coverage first, price second
The classic error is choosing on per-gigabyte cost and then hitting a coverage hole mid-route. Country lists vary more than people expect, with Cambodia and Laos the likeliest omissions — inconvenient, given they sit squarely on the well-trodden overland run between Thailand and Vietnam.
List out every border you plan to cross, hold it against the provider's own live coverage page, and only compare pricing afterwards. A bargain plan that stops working in Laos was never a bargain. Validity deserves a look too — 15- and 30-day windows are restrictive for anyone travelling slowly.
It's also worth asking whether regional is needed at all. Per gigabyte these plans are dearer than single-country ones; the premium buys convenience and a pooled allowance, not savings. Over three or four borders that stacks up. For one or two stops, a free Vietnam eSIM plus a single local plan generally wins.
What no eSIM will sort out
Handle your data and you've done half the job. The half that ambushes travellers is standing in a Hanoi market, a Bali warung or a Manila corner store, watching every local pay by scanning while your card gets politely refused.
The default fallback is cash, which means ATM charges at each border, a new stack of unfamiliar notes, and leftover currency you'll never use again. LocalPay is built to remove exactly that: one wallet, QR payments across Vietnam, Indonesia and the Philippines, configured before you leave home.
Given the 5GB Vietnam eSIM is bundled free, there's little argument for not having it installed before departure — even if a paid regional plan ends up covering the rest of your route.
Download LocalPay“Regional eSIMs fix fragmented data. Not one of them touches fragmented payments — and across Southeast Asia that's the pricier failure.”
Sort these before departure
- Install LocalPay first — the free 5GB Vietnam eSIM activates on home wifi and the wallet covers three countries.
- Buy a paid regional plan only for the stretches LocalPay's eSIM doesn't reach.
- Test any regional plan's country list against your genuine route — Cambodia and Laos are the common gaps.
- Weigh validity against trip length; brief windows suit quick trips, not leisurely overland ones.
- Bear in mind every paid regional eSIM is data-only — no number, no SMS, no means of paying.
- Deal with payments before you land, not while holding up a queue at a market stall.
The logical sequence is to install LocalPay first — the Vietnam eSIM costs nothing and the wallet spans three countries — then buy a paid regional plan solely for whatever your route still leaves exposed. Most people run this in reverse, pay for coverage they never touch, and still land with no way to pay a street vendor.
Handle both halves before you fly and everything downstream gets easier.
Frequently asked questions
Where Vietnam is part of the trip, begin with LocalPay's free 5GB Vietnam eSIM, which also brings QR payments across Vietnam, Indonesia and the Philippines. Add a paid regional plan purely for the outstanding legs — Airalo Asialink for widest coverage, Nomad Regional APAC for value, Saily if Australia or New Zealand are next.
LocalPay bundles a free 5GB Vietnam eSIM at signup, together with a payments wallet spanning Vietnam, Indonesia and the Philippines. Paid regional plans reach more countries, but none offers a free tier and none deals with payments.
It won't. Regional eSIMs are data-only — they get your phone online and stop there. Paying at the cafes, markets and vendors running on local QR codes requires a separate wallet, which is what LocalPay covers across Vietnam, Indonesia and the Philippines.
Not per gigabyte — you pay a premium for convenience and for one allowance spanning countries. That premium generally earns out from three borders upward. With fewer stops, a free Vietnam eSIM plus one local plan usually costs less overall.
No. They're data-only, so no local number and no SMS anywhere on the list. Calling happens over WhatsApp, Telegram, FaceTime and similar via the data connection.
Roughly 1GB per day works as a planning figure, though the region's widespread wifi means most travellers come in comfortably below it. On that basis LocalPay's free 5GB handles a typical Vietnam leg.
