Will one eSIM cover my whole route?
Yes, within Vietnam. The plan works in every city and region, so you don’t need a new SIM at each stop. Crossing into Cambodia or Laos needs a separate plan.
Prices in pounds · for UK travellers
eSIM for Vietnam from the UK
Hanoi, Ha Long Bay, Hoi An and Saigon in one trip? One eSIM covers every stop. See how much data a multi-stop route needs, and the price in pounds.
- QR code by emailinstall before you fly
- Keep your UK numberdata-only eSIM
- 24/7 live chatin the Graba SIM app
- Pay your way
Before you buy: straight answers
How much data does a two-week route need?
About 10 to 15 GB covers Grab, maps, bookings and social media for two weeks. Overnight trains and buses often have little signal, so plan offline.
Can I use Grab without a Vietnamese number?
Yes. Sign in to Grab before you fly with your UK number, then use it over the eSIM’s data.
What your trip to Vietnam costs
Set your trip length and how you use your phone. eSIM bars are data-only plans that cover the whole trip; UK network bars use your UK allowance and include calls and texts. EE and O2 and Vodafone don’t publish a price for Vietnam that we can check, so they aren’t charted.
Sources: Three roaming (checked 6 November 2026) · Airalo fixed-data plans (checked 9 November 2026). Prices change; check before you buy.
Vietnam eSIM
How long is your trip?
Pick the trip that sounds most like yours. Every plan is data only, paid once, with no contract.
Prices in GBP
Not sure? Answer 3 quick questionsWe’ll show the maths behind our suggestion.
Swipe to compare plans
On every plan here
- Uses Viettel Mobile, Vinaphone, and MobiFone, with 5G where available
- Starts when you first connect, so you can install it before you fly
- QR code by emailInstall it in minutes
- Keep your numberData only, your SIM stays in
- 24/7 live chatIn the Graba SIM app
- Pay onceNo contract, guest checkout
More options
Other sizes for different kinds of trip.
Only need a day?
A day pass gives you full-speed data for one day, then slower data for the rest of the day.
500MB to 10GB a day
From £1.99
See day passesHow we choose these plans
For each trip we pick the current plan that costs the least while lasting the whole trip and gives about 0.3 to 0.7 GB a day, enough for maps, messages and social media. A plan may last longer than the trip. Everyone uses data differently, so check your phone’s recent data use. “Best value” only appears when that plan also costs the least per GB of all the plans that fit.
Arriving in Vietnam
- SGN Ho Chi Minh City
- HAN Hanoi
- DAD Da Nang
- CXR Nha Trang Cam Ranh
- PQC Phu Quoc
Most UK travellers arrive via Hanoi (HAN) or Ho Chi Minh City (SGN), often with a stop in Asia or the Gulf. Grab and other ride apps are the easy way into the city.
Signal where people go
- Hanoi and Ho Chi Minh City
- Strong signal across both cities.
- Ha Long Bay
- Good on most cruise routes; some bays and caves are out of range.
- Hoi An and Da Nang
- Strong in town and along the beaches.
- Sapa and the north
- Good in Sapa town; trekking valleys and the Ha Giang loop have gaps.
Networks our Vietnam plans use: Viettel MobileVinaphoneMobiFone
Your UK network in Vietnam
Vietnam is outside the EU, so Europe roaming deals on UK plans don’t cover it. What each network publishes for Vietnam, and a week of it:
| Network | What it charges | 7 days | Compare |
|---|---|---|---|
 EE | Varies by plan EE doesn’t publish one price for every country: it prices roaming by destination, plan and start date. Check EE’s roaming tool for Vietnam. | No published price | EE roaming |
| O2 | Not in O2 Travel Vietnam isn’t on O2 Travel’s destination list, so O2’s standard roaming rates apply. Check them on O2’s website. | No published price | O2 roaming |
| Vodafone | Check Vodafone Check what Vodafone charges in Vietnam in its roaming charge checker. Its European roaming passes only cover Zone B. | No published price | Vodafone roaming |
 Three | Go Roam Around the World £8 a day in Go Roam Around the World (£5 on plans from 2021 to 2025), or £30 for a 7-day pass. Unlocks your UK calls, texts and up to 12 GB of your UK data. | £30.007-day pass | Three in Vietnam vs eSIM |
Sources: EE (checked 29 October 2026) · O2 (checked 29 October 2026) · Vodafone (checked 29 October 2026) · Three (checked 6 November 2026). Prices change; check before you buy.
Graba SIM vs Airalo: the same plans, side by side
Plans with exactly the same data allowance and validity for Vietnam, both data-only and priced in pounds. Coverage and networks can differ, so check the plan details before you buy.
Highlighted: the lower price for each plan. Holafly sells unlimited data only, priced in US dollars, so it isn’t in this like-for-like table.
Sources: Airalo fixed-data plans (checked 9 November 2026). Prices change; check before you buy.
Compare prices for Vietnam
Know before you go
- Grab is the main app for rides and food in Vietnam. It needs mobile data to book and track rides.
- Multi-stop trips use more data than you think: maps, bookings and messages at every stop. About 1 GB a day is a safe guide.
- Vietnam is outside the EU, so Europe roaming deals on UK plans don’t cover it. Check your network’s rate before you go.
Crossing a border from Vietnam?
A Vietnam plan covers Vietnam only. This is what your UK network charges next door:
| Going on to | O2 | Three | Vodafone | eSIM |
|---|---|---|---|---|
| CambodiaSiem Reap and Phnom Penh | Standard rates | £8 a day (Go Roam Around the World Extra) | Check Vodafone | Cambodia plans |
| LaosLuang Prabang | Standard rates | Standard rates | Check Vodafone | Laos plans |
| Thailandonward flights to Thailand | £7 a day | £8 a day (Go Roam Around the World Extra) | Zone D: daily fee | Thailand plans |
Set it up before you fly
- Check your phone is unlocked and supports eSIM on our compatibility page.
- Install the plan at home on Wi-Fi with our iPhone or Android guide.
- When you land at Ho Chi Minh City, switch mobile data to the eSIM and turn on data roaming for it only.
Questions about Vietnam
Does a Vietnam eSIM work on a Ha Long Bay cruise?
On most routes, yes, with gaps among the more remote islands and inside caves. Save boarding details before you sail.
Does a Vietnam eSIM work in Cambodia or Laos?
No. A Vietnam plan covers Vietnam only. For an overland trip, add a plan for each country or choose an Asia plan that lists them all.
Is a travel eSIM cheaper than roaming in Vietnam?
For a week with about 0.7 GB a day, the Graba SIM 5GB, 30 days plan costs £8.25, less than each published UK network option for Vietnam (the lowest is Three at £30.00). UK network prices include calls and texts; the eSIM is data only.
What do UK networks charge in Vietnam?
EE: EE doesn’t publish one price for every country: it prices roaming by destination, plan and start date. Check EE’s roaming tool for Vietnam. O2: Vietnam isn’t on O2 Travel’s destination list, so O2’s standard roaming rates apply. Check them on O2’s website. Vodafone: Check what Vodafone charges in Vietnam in its roaming charge checker. Its European roaming passes only cover Zone B. Three: £8 a day in Go Roam Around the World (£5 on plans from 2021 to 2025), or £30 for a 7-day pass. Unlocks your UK calls, texts and up to 12 GB of your UK data.
What if something goes wrong?
Live chat in the Graba SIM app is open 24/7. Email and contact-form requests are answered Monday to Friday.
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