Quick answer: The best eSIM for Vietnam in 2026 is a prepaid data plan on Viettel Mobile. esimbloom lists 15 plans from $0.72 for 100MB over 7 days; the best value for a month is 20GB for 30 days at $30.31 ($1.52/GB). Install by QR before you fly; it activates on first connection in Vietnam.
Vietnam rewards the connected traveller: Grab bikes through Hanoi traffic, translated menus in Hue, booking overnight trains — it all runs on data, and Vietnamese data is famously cheap and fast. esimbloom's Vietnam-only plans run on Viettel Mobile (15 plans from $0.72, up to 50GB).
esimbloom Vietnam plans are delivered instantly and work from Hanoi to the Mekong Delta, including the Ha Long Bay area and the mountain north around Sapa.
Vietnam eSIM plans compared (2026 prices)
Live prices from the esimbloom catalog in USD, refreshed every 15 minutes. Price per GB is the plan price divided by its data allowance.
| Data | Validity | Price (USD) | Per GB | Network | Coverage | Buy |
|---|---|---|---|---|---|---|
| 100MB | 7 days | $0.72 | $7.37/GB | Viettel Mobile | Vietnam only | Get plan → |
| 500MB | 7 days | $1.10 | $2.25/GB | Viettel Mobile | Vietnam only | Get plan → |
| 1GB | 7 days | $2.04 | $2.04/GB | Viettel Mobile | Vietnam only | Get plan → |
| 3GB | 15 days | $5.42 | $1.81/GB | Viettel Mobile | Vietnam only | Get plan → |
| 3GB | 30 days | $5.76 | $1.92/GB | Viettel Mobile | Vietnam only | Get plan → |
| 5GB | 30 days | $9.05 | $1.81/GB | Viettel Mobile | Vietnam only | Get plan → |
| 10GB | 30 days | $16.51 | $1.65/GB | Viettel Mobile | Vietnam only | Get plan → |
| 20GB · best value | 30 days | $30.31 | $1.52/GB | Viettel Mobile | Vietnam only | Get plan → |
| 500MB | 1 day | $1.22 | $2.50/GB | Viettel Mobile | Vietnam only | Get plan → |
| 1GB | 1 day | $1.92 | $1.92/GB | Viettel Mobile | Vietnam only | Get plan → |
Which Vietnam eSIM for your trip length?
The cheapest plan in the catalog that lasts the whole trip with a realistic data floor: 1GB for a weekend, 3GB for a week, 5GB for two weeks, 10GB for a month.
A weekend (up to 3 days)
$2.04
1GB · 7 days · Viettel Mobile
One week
$5.42
3GB · 15 days · Viettel Mobile
Two weeks
$9.05
5GB · 30 days · Viettel Mobile
One month
$16.51
10GB · 30 days · Viettel Mobile
Networks and coverage in Vietnam
Vietnam-specific plans in the catalog run on Viettel Mobile (15 plans). Each plan's network is stated on the plans page before checkout.
How we picked the best eSIM for Vietnam
- Price per gigabyte on the plan sizes travellers actually buy (3–20GB over 7–30 days), from live catalog prices — not the headline "from" price.
- Network: which local operator the plan connects to, taken from the plan data, not marketing copy.
- Fit for the trip: validity that outlasts the stay, coverage that matches the route (single-country versus multi-country).
- No surprises: prepaid, no contract, no roaming fees, hotspot allowed, validity that starts on first connection rather than at purchase.
We do not quote other providers' prices on this page because they change without notice; compare on the same four points and the answer is usually clear.
Travel tips: staying connected in Vietnam
- Grab is transport, food and courier in one app across Vietnamese cities — the essential first install, and it needs live data from the airport curb.
- Sapa trekking routes and the Ha Giang loop have signal in towns and gaps between them on every network — download offline maps for mountain days.
- Ha Long Bay cruises drift out of coverage between karsts; overnight boats warn about it — download entertainment before boarding.
Vietnam eSIM — frequently asked questions
Which network is best for a Vietnam eSIM?
esimbloom's Vietnam-only plans connect to Viettel Mobile; each plan states its network on the plans page before checkout.
Does an eSIM work in Sapa and the Ha Giang loop?
Towns and main roads, yes. Remote trekking valleys have gaps; download offline maps for mountain days.
How much data do I need for 2 weeks in Vietnam?
5GB is comfortable for navigation, Grab and social; Vietnamese plan pricing makes 10GB a cheap upgrade if you stream or hotspot.
How much does an eSIM for Vietnam cost?
esimbloom Vietnam plans start from $0.72 for 100MB over 7 days, with 15 plans up to 50GB. There are no roaming fees and no contracts — you pay once for the plan you pick.
Is there an unlimited data eSIM for Vietnam?
Not at the moment. The largest Vietnam plan in the catalog is 50GB for 180 days at $104.83 ($2.10/GB) with full-speed data and hotspot — for most travellers that beats a throttled 'unlimited' plan.
When does a Vietnam eSIM activate — should I install it before I travel?
Install it at home on Wi-Fi as soon as the QR code arrives; validity only starts when the eSIM first connects to a network in Vietnam. Keep the line switched off until you land, then enable it and turn on data roaming for that line only.