SimJu vs Airalo for Vietnam: Which eSIM Should You Buy? (2026)

You land in Ho Chi Minh City or Hanoi, and the first thing you need isn't a taxi; it's data. Grab, Google Maps, and your hotel confirmation all live on your phone, and airport Wi-Fi won't cut it for long.

Airalo runs on Vietnam's stronger Viettel/Mobifone networks and has years of reviews behind it, making it the safer pick for reliability, especially outside major cities. SimJu is newer, cheaper to start (from $2.50), skips the ID-verification step, and offers a 30-day refund on unused eSIMs, making it worth a look if you want the simplest checkout.

Both are data-only eSIMs with no physical SIM swap required.

Quick Comparison Table

SimJu is the cheaper entry point here, while Airalo's higher starting price reflects its stronger network coverage (Viettel/Mobifone) and more established track record. 

Network Coverage in Vietnam

• Network choice is arguably the single biggest factor in how well your eSIM actually performs once you're on the ground, and this is where SimJu and Airalo take genuinely different approaches

• SimJu runs on Vietnamobile for 4G and Vinaphone for 5G, a combination that covers Hanoi, Ho Chi Minh City, Da Nang, and other major hubs reliably

• Vietnamobile has historically had thinner coverage once you head into rural or mountainous regions

• Airalo, by contrast, connects through Viettel and Mobifone, and Viettel in particular is widely regarded as Vietnam's most complete network, with the deepest rural and remote-area penetration of any carrier in the country

• That matters if your trip includes places like Sapa, the Ha Giang Loop, Phu Quoc, or other island and highland areas where weaker networks can drop to unusable speeds or no signal at all

• If your trip is confined to major cities, either network will likely serve you fine

• But if you're heading off the beaten path, Airalo's Viettel backbone gives it a clear coverage edge. SimJu's setup is solid for urban travel, but not built for Vietnam's more remote corners

Airalo wins on coverage breadth; SimJu is sufficient for city-only itineraries.

Pricing & Data Plans

  SimJu Plans

• Starting price: $2.50 for the smallest data tier

• Multiple data tiers available for longer trips or heavier data use, priced per GB rather than a flat rate

• Pre-activation window of 180 days, meaning you can buy and install the eSIM well ahead of your trip without the clock starting

• Plan only begins counting down once you first connect to a network in Vietnam, not at purchase

• No account needed; guest checkout keeps the buying process simple

• 30-day money-back guarantee applies if the eSIM goes unused

Airalo Plans

• Starting price: $4.00, reflecting Airalo's stronger network backbone (Viettel/Mobifone)

• 6 local Vietnam plan tiers, giving more granular options for data amount and trip length

• Value plan priced around $4.00/GB for standard data tiers

• Unlimited option available: full-speed data up to 3GB/day, then throttled to a slower speed for the remainder of that day

• Requires an Airalo account and ID verification before purchase  an extra step compared to SimJu's guest checkout

• Plan also activates on first network connection in Vietnam, not at purchase

SimJu is the more budget-friendly entry point and better suited to short trips or light data users. Airalo's higher price buys a stronger network and more plan flexibility, including an unlimited option, making it the better value for longer stays or heavier daily data use.

Setup, Activation & Data Routing

Getting connected involves more than just picking a plan. How you buy, install, and activate it can make or break your first hour in Vietnam. Here's how SimJu and Airalo compare on the practical side.

SimJu

• No account required, just a guest checkout

• eSIM QR code arrives by email within minutes of purchase

• Installation takes about 2 minutes: scan the code, follow the prompts, and you're ready to go

• Data routes through Hong Kong as its "data exit country," meaning your traffic passes through a Hong Kong server before reaching the open internet

• This can add a small amount of latency compared to a plan that routes locally, though it's unlikely to be noticeable for everyday use like maps, messaging, and browsing

• Worth knowing if you're relying on the eSIM for anything latency-sensitive, like video calls

Airalo

• Setup happens through the Airalo app

• Requires creating an account and completing ID verification before you can purchase a plan

• Adds an extra step compared to SimJu's guest checkout

• Purchase history and plans are saved in one place, useful if you're buying eSIMs for multiple countries on the same trip

Both providers activate the plan the same way: nothing starts counting down at purchase. The clock begins only when your eSIM first connects to a network inside Vietnam, so you can install either well before you fly.

Hotspot, Keeping Your Number & Support

Both eSIMs support hotspot sharing, so you can tether a laptop or share your connection with a travel companion. And since both are data-only, your physical SIM stays active the whole time; calls, texts, WhatsApp, and iMessage on your usual number keep working exactly as before.

On support, SimJu offers 24/7 human support and a 30-day money-back guarantee on any unused eSIM. Airalo offers 24/7 chat and email support, backed by a well-established track record and a large base of user reviews across countries, including Vietnam.

Who Should Choose Which

Choose SimJu if:

• You want the cheapest entry point for light data use

• You'd rather skip account creation and ID verification

• You value a straightforward 30-day refund window

• Your trip is mostly city-based (Hanoi, Ho Chi Minh City, Da Nang)

Choose Airalo if:

• You're heading off the beaten path (Sapa, Ha Giang Loop, Phu Quoc)

• You want the more established, widely reviewed option

• You're fine with app-based setup and ID verification for stronger coverage

• You need an unlimited data tier for heavier daily use

It comes down to trip length, destination type, and whether you prioritize network strength or checkout simplicity.

FAQs

Do I need an ID to buy either?

Airalo requires account creation and ID verification before purchase. SimJu doesn't; you can buy through guest checkout with no account or ID needed. 

Does either work in rural Vietnam?

Both work, but coverage quality differs. Airalo's Viettel network has the strongest rural and remote-area reach in Vietnam, making it the safer bet for places like Sapa, the Ha Giang Loop, or outer islands. SimJu's Vietnamobile network is solid in cities but thinner outside them.

What happens if I run out of data?

You can top up. SimJu supports top-ups on the same eSIM, and Airalo lets you purchase an additional plan if you run low, both without needing to reinstall anything.

Is 5G available on both?

SimJu offers 5G through its Vinaphone connection. Airalo's Vietnam plans currently run on 4G only. That said, 5G coverage in Vietnam is still limited outside major cities, so the practical difference may be small depending on where you're traveling.

Conclusion

SimJu wins on price and simplicity: no account, no ID, just a QR code and you're online. Airalo costs more but delivers stronger coverage through Viettel, especially outside major cities. Staying close to Hanoi or Ho Chi Minh City? SimJu's the easy pick. Heading to Sapa or island-hopping in Phu Quoc? Airalo's coverage is worth the extra cost.