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How it worksVietnam eSIM
Your eSIM arrives within minutes, starts when you first connect in Vietnam, and tops up whenever you need more.
Choose your plan.
Before you buy, just confirm your device is eSIM-compatible and network-unlocked.
Plan details
- Connects on 3G, 4G and 5G where the local network has it
- Hotspot and tethering on plans that support it, where the local network allows
- Keep your own number, data only (no calls or texts)
- Activates on first connection, not at purchase
- Top up any time while your plan is running
Need broader coverage?
Regional and Global eSIMs cover Vietnam and plenty more.
Your eSIM arrives within minutes, starts when you first connect in Vietnam, and tops up whenever you need more.
Across Vietnam, you're in good hands. Off to Vietnam? You're in good hands.
Four things we'll tell you before you pay, not after.
You’ll know your network
200+ networks. Named on every plan. Connected via trusted networks in 195+ destinations.
Explore networks
Unlimited, explained.
A daily full-speed allowance. Then 1 Mbps for the rest of the day. Your full-speed data resets the next day.
Unlimited explained
Emailed within minutes
Buy at the gate if you have to. Install now, ready when you land.
When to install 1 / 4
Networks vary by destination and are listed on each plan. All trade marks are the property of their respective owners. Halo is not affiliated with these operators.
Before you go.
Staying connected in Vietnam
Vietnam has surprisingly good coverage for a country of its geography. The corridor from Hanoi through Hue and Da Nang to Ho Chi Minh City is dense, the coast is well served, and even the smaller towns in the Mekong Delta hold a signal. The gaps are in the far north around Ha Giang and Sapa, where the mountains do what mountains do, and on the more remote stretches of the central highlands. A Halo eSIM installs before you fly and starts counting on its first connection after you arrive. Train journeys along the coast keep a signal for most of their length. Ha Long Bay cruises lose it once you are properly out among the karsts, so download anything you need before boarding and save your itinerary locally.
How much data you'll need
Five to eight GB for a week. Ride-hailing and maps run almost continuously in Hanoi and Ho Chi Minh City, and translation gets heavy use. Longer trips with overnight trains and buses push it higher because you will stream or download to pass the time.
5G
Our Vietnam plans run on networks carrying 5G, which is available in the major cities and not yet widespread in the countryside.
Updated September 2026
Questions? We've got answers.
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Will I have signal on a Ha Long Bay cruise?
Near the shore and around Ha Long city, yes. Out among the islands and karsts the signal drops away and many boats have no usable coverage at all. Download your itinerary and anything you want to read before you board, and expect to be offline for most of an overnight cruise.
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Is coverage good on the Ha Giang loop and around Sapa?
Patchy. The towns have coverage and the passes between them frequently do not. This is mountainous country with deep valleys, so plan for extended stretches with nothing. Download the route offline before you set out, particularly if you are riding it yourself.
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Can I call and send SMS on my Vietnam eSIM?
Halo eSIMs are exclusively data-only eSIMs. While you can engage in voice calls and messaging through WhatsApp, Facetime, and other widely used VOIP apps, traditional phone calls and SMS are not supported.
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Is my device compatible with this Vietnam eSIM?
Most phones from 2018 onwards support eSIM, including iPhone XR and XS and newer, Pixel 3 and newer, Galaxy S20 and newer. If it's a reasonably recent phone, you're probably fine. Check our device compatibility page if you want to be sure.
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When should I set up my Vietnam eSIM?
Before you leave, while you're still on Wi-Fi. Your plan only starts counting when you first connect to a network at your destination, so there's no cost to installing early. Vietnam plans run from 1 to 45 days from that first connection. One less thing to sort at the airport.
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Which networks does my Vietnam eSIM use?
Each plan lists its own networks and speed policy under Plan details on this page. Which networks a plan uses is set by our network partners and can change without notice, so we show them per plan rather than for the destination as a whole. Your device finds and connects to a supported network on its own when you arrive.
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Can I top up my Vietnam eSIM?
Yes, on the fixed-data plans. Running low? Purchase another plan for the same destination from your order page. The new data gets added to your existing eSIM. No reinstall needed. Top-ups are not available on the Unlimited (daily) plans. To keep using data after an Unlimited plan ends, buy a new plan.
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Can I hotspot with my Vietnam eSIM?
Hotspot availability depends on the plan. Halo adds no separate hotspot cap and does not meter hotspot data differently, so on plans that support it you can share your connection with a laptop, tablet or travel companion where the local network allows. Hotspot is provided by the network operator in Vietnam rather than by Halo, so it is not something we can guarantee on every plan.
Still have questions?
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