Connect across Vietnam on Viettel, Vinaphone, and Mobifone. Fast 4G/LTE in Hanoi, Ho Chi Minh City, Da Nang, Hội An, and Ha Long Bay. Our Vietnam eSIM activates instantly — land connected at Nội Bài or Tân Sơn Nhất without hunting for a SIM kiosk.
5G ready Hotspot included Keep your home line 24/7 humans
Change your mind within 7 days and we refund in full — as long as the eSIM is unused or under 100 MB, so you can install it and check it connects first. A plan that genuinely fails is refunded any time. Details.
Pick data amount and validity. Pay with card, Apple Pay, or Google Pay.
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Scan the QR code
We email a QR code instantly. Scan it in Settings — installed in under 60 seconds. No app needed.
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Land online in Vietnam
Your phone connects to local networks automatically when you arrive. No SIM swap, no kiosk. Hotspot included.
Network
Coverage & connectivity.
Networks we run on in Vietnam
Viettel Mobile5GVinaphone5G
Your device connects to the strongest available network automatically — no manual setup.
Hanoi Ho Chi Minh City Da Nang Hai Phong Bien Hoa
Vietnam has one of Southeast Asia's most developed 4G networks, with Viettel leading in both urban density and rural reach. Coverage extends to all cities, provincial capitals, and major tourist destinations. Ho Chi Minh City and Hanoi have high-density 4G with 5G rolling out in business districts. The coastal resort corridor from Da Nang to Hội An has reliable LTE throughout. Ha Long Bay has 4G on most cruises while in port and in the bay itself — remote outer islands of the archipelago may be weaker. Sapa and northern highland areas have adequate 4G in Sapa town, thinning to 3G on mountain treks. The Reunification Express train route along the coast maintains solid 4G in populated areas. Mekong Delta towns have reliable LTE; small river villages may drop to 3G.
Plan size
How much data do you need?
Pick your travel style and trip length — we'll suggest the right Vietnam plan, no guessing.
Yes on cruise ships while in the bay. Ha Long city and major karst island areas have 4G. Very remote outer islands may have weaker signals. Most cruise operators have on-board Wi-Fi as backup.
Does this work in Hội An and Da Nang?
Yes. Both have excellent 4G coverage. Da Nang airport arrivals area has fast LTE immediately. Hội An Old Town is well-connected throughout.
Will my eSIM work on the Reunification Express train?
Yes in populated coastal areas. The Da Nang–Huế stretch through mountain passes may have brief gaps. Hanoi and HCMC departure zones have full coverage.
Is Facebook and Instagram accessible in Vietnam?
Yes. Facebook, Instagram, WhatsApp, and Google services are accessible in Vietnam without restriction on our data network.
Is this cheaper than buying a SIM at the airport in Vietnam?
Yes. Airport SIM vendors at Nội Bài and Tân Sơn Nhất charge tourist rates. Flysimio connects to the same Viettel/Vinaphone network at significantly lower cost — and you skip the registration queue.
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM built into your phone. Instead of a physical card, you scan a QR code and your plan installs instantly — no SIM tray needed.
Is my phone eSIM-compatible?
iPhone XS (2018) and newer, most Android flagships from 2020+, and all Samsung Galaxy S21+ devices support eSIM. Check our compatibility page for the full device list.
How do I install the eSIM?
After purchase, we email a QR code. On iPhone: Settings → Cellular → Add eSIM → Scan QR Code. On Android: Settings → Network & Internet → SIMs → Add eSIM. The whole process takes under 60 seconds.
Can I keep my regular SIM while using this eSIM?
Yes. Most phones support dual SIM (physical + eSIM). Keep your home number for calls and SMS — use Flysimio for data abroad. You control which SIM handles what in your phone Settings.
Does the eSIM include a hotspot (tethering)?
Yes, all Flysimio plans include mobile hotspot at no extra charge. Share your data connection with laptops, tablets, or other devices freely.
What happens when my data runs out?
You can top up data from your account dashboard at any time. Top-ups are applied instantly — no need to buy a new eSIM or wait.
Can I get a refund?
Yes. We offer a full refund within 7 days of purchase. Contact contact@flysimio.com with your order number.
How long is the eSIM valid for?
You have 6 months from your purchase date to activate the eSIM. Once activated, the plan validity period (e.g., 7 days, 30 days) begins counting down.
Will the eSIM work at the airport when I land?
Yes — as long as you installed the eSIM before your flight, it activates automatically when your phone connects to a local network on landing. No Wi-Fi required for activation.
What if the QR code doesn't scan?
If the QR code won't scan, you can enter the activation code manually — we include both in the email. You can also contact our 24/7 support team and we'll resend or manually provision your eSIM.
eSIM in Vietnam
The complete guide.
Best eSIM for travel to Vietnam
A great Vietnam eSIM needs strong coverage, honest pricing, and instant setup. Flysimio connects to Viettel, Vinaphone, and Mobifone — with Viettel offering some of Southeast Asia's widest reach, covering Hanoi, Ho Chi Minh City, Da Nang, Hội An, and Ha Long Bay — plus 5G rolling out in the business districts. Plans are prepaid with no contract and no roaming surprises, so the price you see is what you pay. Your QR code arrives by email seconds after checkout and installs in under a minute, every plan includes free mobile hotspot, and there's a 7-day money-back guarantee. Land at Nội Bài or Tân Sơn Nhất already connected — no SIM kiosk, no registration queue.
How to set up a Vietnam eSIM (step by step)
Getting online in Vietnam takes about two minutes. First, confirm your phone supports eSIM — iPhone XS (2018) and newer and most Android flagships from 2020 qualify. Choose your Vietnam plan on Flysimio and pay with card, Apple Pay, or Google Pay; your QR code arrives by email within seconds. On Wi-Fi before you fly, open Settings → Cellular → Add eSIM (iPhone) or Network & Internet → SIMs → Add eSIM (Android) and scan it — a manual code is included too. Keep your home line as default until arrival; when you land at Hanoi, Ho Chi Minh City, or Da Nang, your Flysimio line connects automatically to a Vietnamese network — no kiosk, no physical SIM.
How much data do you need in Vietnam?
Most travellers over-buy. For maps, messaging, and email, roughly 300 MB a day is plenty, so a 3–5 GB plan covers a week comfortably. Add social media, photos, and music and you'll want about 700 MB a day — a 10 GB plan suits a two-week trip from Hanoi down to the coast and Ho Chi Minh City. Heavy streamers, video callers, and anyone tethering a laptop should plan for 1.5 GB or more per day or choose an unlimited daily plan. Not sure? The calculator above matches your travel style and trip length to a size, and you can top up mid-trip if you run low.
Using a Vietnam eSIM on iPhone and Android
Flysimio runs as a second line beside your usual SIM, so you keep your home number for calls and texts while your Vietnamese data flows over the eSIM — standard dual-SIM behaviour on iPhone XS and later and most Android phones from 2018. After installing, set the Flysimio eSIM as your cellular-data line and turn on Data Roaming for that line only; it simply lets the eSIM connect to Vietnamese networks, with no roaming fees. Keep your home SIM on for messages and calls, or switch it off to avoid your own carrier's charges. If you're unsure about your model, the compatibility page confirms it before you buy.
Hotspot, calls, and texts on a Vietnam data eSIM
Every Flysimio Vietnam plan includes mobile hotspot at no extra cost and without throttling, so you can tether a laptop or tablet or share with a travel companion and use your full allowance freely. As a data-only eSIM it has no Vietnamese phone number, but that rarely matters: WhatsApp, Facebook Messenger, FaceTime, and Google Meet all work normally over data, and your home number stays reachable on your primary SIM. You stay connected from Hanoi to the Mekong Delta without the per-minute charges of traditional roaming.
Short Vietnam trips vs. long stays
For a few days in Hanoi or a quick beach break in Da Nang, a small 1–5 GB plan on a 7-day validity is the most economical choice. For a two-week north-to-south journey or a longer stay, a 10–20 GB plan or an unlimited daily option lets you navigate, stream, and share without watching a meter. Because Flysimio gives you six months to activate, you can buy before you leave and the validity only starts when your eSIM first connects in Vietnam. No contract, nothing to cancel — the plan stops when it's done, and you can top up or rebuy for your next trip.
