Vietnam
eSIM.Fast 5G data plans. Instant activation, no SIM swap.

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.

Yes. Both have excellent 4G coverage. Da Nang airport arrivals area has fast LTE immediately. Hội An Old Town is well-connected throughout.

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.

Yes. Facebook, Instagram, WhatsApp, and Google services are accessible in Vietnam without restriction on our data network.

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.

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.

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.

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.

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.

For most trips, yes. A tourist SIM card means finding a shop or airport kiosk on arrival, showing your passport, and swapping out your home SIM. An eSIM is bought online, installed at home before you fly, and connects when you land, while your home SIM stays in the phone. A local SIM can be cheaper per GB for long stays of a month or more, and it is the option to choose if you need a local phone number.

No. Flysimio travel eSIMs are data-only, so there is no local phone number for calls or SMS. WhatsApp, iMessage, FaceTime and other calling apps work over the data connection, and your home number stays active on your regular SIM for calls and texts.

You connect to the same local 4G/LTE and 5G networks listed on this page, at the speeds those networks give local customers where you are. 5G works where the network and your phone both support it. Daily plans run at full speed up to the daily allowance and are slowed for the rest of that day; fixed-data plans run at full speed until the data is used.

Yes, all Flysimio plans include mobile hotspot at no extra charge. Share your data connection with laptops, tablets, or other devices freely.

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.

Yes. Full refund within 7 days of purchase, no questions asked, as long as the eSIM is unused or has used less than 100 MB — that allowance means you can install it and check it connects without losing the guarantee. Past 100 MB we still refund in full for verified faults, such as activation details that never arrived or a technical failure on our side. Contact contact@flysimio.com with your order number.

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.

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.

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.