Best eSIM for Vietnam: top plans compared for travelers

Key Takeaways:

• The Best eSIM for Vietnam eliminates the need for a physical SIM card, saving you time at the airport and money compared to carrier roaming rates.
• Short-trip travelers (1–7 days) get the best value with a Ubigi 10GB/7-day plan at $10.90: fast, simple, and sufficient for most uses.
• Budget-conscious tourists can be connected for just $6.90 with a Ubigi 3GB/15-day plan, ideal for light browsing and messaging.
• Heavy streamers and remote workers should go straight for the Ubigi unlimited 30-day plan at $54.90: no throttling worries, full speed ahead.
• The Ubigi 20GB/month plan at $18 is the sweet spot for longer stays, as it is a monthly subscription. 
• Always verify your device supports eSIM before purchasing. Most phones released after 2019 are compatible.
• Activating your eSIM before boarding means you’re online as soon as you land.

Introduction 

An eSIM (embedded SIM) is a digital SIM built into your device. You download a data plan before your trip, activate it with a QR code, and you’re online as soon as you arrive.

Traveling to Vietnam and want reliable internet from the moment you land? An eSIM is the fastest, most affordable way to stay connected: no physical SIM card, no roaming shock from your US carrier.

Why use an eSIM for Vietnam instead of a local SIM?

Vietnam has solid 4G LTE coverage across major cities like Hanoi, Ho Chi Minh City, Da Nang, and Hoi An, with 5G expanding in urban areas. But getting a local SIM at the airport can mean long queues, language barriers, and the hassle of managing a second physical card.

An eSIM solves all of that. You buy and activate your plan online, often in under 10 minutes, and keep your home number active on the same device. No swapping, no losing your SIM, no carrying a paperclip to open the tray.

Compared to AT&T or T-Mobile international day passes (typically $10–$15 per day), an eSIM plan for Vietnam is dramatically cheaper, especially for trips longer than a week.

Vietnam Ubigi plans: full comparison

Here’s every available Ubigi eSIM plan with a clear recommendation for each type of traveler (data from August 2026):

Which plan fits your trip?

Going for a weekend or less than a week? The Ubigi 10GB/7-day plan at $10.90 covers navigation, messaging, social media, and casual streaming without overpaying for unused data.

Staying 2–4 weeks as a tourist? The Ubigi 10GB/30-day plan at $12.90 is the most budget-friendly option for moderate users. If you plan to stream video or use video calls regularly, step up to the 20GB/month plan at $19, it’s the best balance of price and capacity.

Working remotely from Vietnam? Skip the mid-tier options. The monthly data plan with 20GB at $18 is the best choice. The Ubigi unlimited 30-day plan at $54.90 gives you peace of mind for video calls, large file transfers, and full-day connectivity.

Backpacking through multiple regions? The 50GB/30-day plan at $36.90 offers massive data at a reasonable price, covering everything from GPS navigation on motorbikes to uploading reels in real time.

How to activate your Ubigi eSIM for Vietnam

The process is straightforward and takes less than 10 minutes:

1. Check compatibility: Most flagship phones released after 2018 are compatible.
On iPhone, go to Settings > General > About and scroll down: if you see an EID number, your phone supports eSIM.
On Android, go to Settings > Connections (or Network) > SIM card manager and look for an “Add mobile plan” option.
You can also dial the free shortcut *#06#: if you see an EID number, it means your device is compatible. 

2. Purchase your plan: choose your data/duration on the Ubigi app or on the website and complete checkout online

3. Install: If you bought your plan with the app, install your eSIM directly from the dashboard. If you bought it via the website, you receive a QR code by mail. Go to Settings > Cellular > Add eSIM, scan the code, and the plan installs automatically.

5. Set your data preference: select the eSIM as your preferred data line while keeping your US number for calls/texts

Pro tip: activate your eSIM at home before departure, then simply toggle it on when your plane lands in Vietnam. You’ll have internet before you reach baggage claim.

Coverage and network quality in Vietnam

Ubigi connects to local Vietnamese networks, giving you access to reliable 4G LTE across the country. Coverage is strong in:

• Major cities: Hanoi, Ho Chi Minh City, Da Nang, Nha Trang, Hue
• Tourist regions: Halong Bay area, Hoi An, Phu Quoc island, Sapa (though mountainous areas naturally have thinner coverage)
• Transport hubs: airports, train stations, major highways

5G is available in select urban zones, though 4G LTE is the standard for most of the country and more than sufficient for streaming, calls, and navigation.

eSIM vs. local SIM in Vietnam: a quick comparison

If you travel to multiple countries, like Vietnam followed by Thailand or Cambodia, a Ubigi regional plan covers you without buying a new SIM at every border. That’s a real advantage for Southeast Asia itineraries.

Tips to get the most out of your Vietnam eSIM

Knowing your plan is only half the battle. A few habits will keep you from burning through data faster than expected.

Download offline maps (Google Maps or Maps.me) before you leave your hotel each morning: navigation is one of the biggest data drains. Set apps like Instagram, YouTube, and cloud backup to update only on Wi-Fi. If you want to go further, check out this guide on how to save mobile data while traveling, small adjustments that add up fast on a long trip.

Also, Vietnam has widespread free Wi-Fi in cafés, hotels, and restaurants, especially in tourist areas. Using Wi-Fi for heavy tasks (video calls, uploads) and reserving your eSIM data for on-the-go use is a smart way to stretch any plan.

Is an eSIM right for extended stays in Vietnam?

Vietnam is increasingly popular with digital nomads: low cost of living, fast internet infrastructure, and a visa-on-arrival policy for US citizens (30 days extendable). If you’re planning a longer stay or a multi-month Southeast Asia trip, look into recurring monthly plans that keep costs predictable month to month.

The 20GB/month rolling plan at $18 is particularly well-suited here. It is enough data for daily work tasks, video calls, and casual use, at a price that won’t eat into your travel budget.

Device compatibility: does your phone support eSIM?

Most modern smartphones support eSIM. Here’s a quick overview:

• Apple: iPhone XS and later (all models)
• Samsung: Galaxy S20 and later, Z Fold/Flip series
• Google: Pixel 3 and later
• Other: Many recent Motorola, OnePlus, and Huawei models

You can also dial the free shortcut *#06#: if you see an EID number, it means your device is compatible. 

One important note for US travelers: some carrier-locked phones may restrict eSIM use. If your device was purchased directly from a carrier (not unlocked), check with them before your trip. Unlocked devices work with any eSIM provider without restrictions. 

FAQ

What is the best eSIM plan for a 2-week trip to Vietnam?

For a two-week vacation, the Ubigi Unlimited 15-day plan at $39.90 is the most convenient option: no data cap, no rationing, full coverage for the entire duration. If you’re a lighter user, the Ubigi 10GB/30-day plan at $12.90 covers two weeks comfortably at a much lower price.

Can I use an eSIM in Vietnam if I have an iPhone?

Yes. All iPhone models from the XS (2018) onward support eSIM. Simply purchase a Vietnam eSIM plan, scan the QR code provided after checkout, and set it as your active data line. Your regular US number remains active for calls and texts through your primary SIM or eSIM slot.

How much data do I need for a trip to Vietnam?

It depends on your usage. Light users (maps, messaging, occasional browsing) will be fine with 3–10GB for a 1–2 week trip. Regular streamers and video callers should plan for 20GB or more. If you work remotely or can’t predict your usage, an unlimited plan removes all guesswork.

Is it cheaper to buy a local SIM in Vietnam or use an eSIM?

Local Vietnamese SIMs (from Viettel, Vietnamobile, or Mobifone) can be very cheap, sometimes under $5 for a basic plan. However, an eSIM offers advantages that offset the price difference: instant setup before departure, no language barrier, no physical swap, and coverage continuity if your itinerary spans multiple countries. For most travelers, the convenience and reliability of an eSIM is worth the marginal cost difference.

Do I need to disable my US carrier’s international roaming when using a Vietnam eSIM?

Yes, it’s strongly recommended. Turn off data roaming on your primary home line in Settings to avoid accidental charges from your home carrier. Use your eSIM as the active data line throughout your trip, while keeping your US number available for calls and texts if needed.