Our recommendation · AsiaVietnam e SIM sizing: 20 GB at $27.49 across three operators
HelloRoam refunds an unactivated eSIM for 180 days, thirteen times the 14-day window Airalo publishes. Vietnam's 20 GB plan costs $27.49 at $1.37 per GB, and the operator list names Viettel Mobile, Vinaphone and MobiFone. Airalo reaches more destinations than HelloRoam, 200+ against 186, so a multi-country route can land the other way.
Vietnam eSIM recommendation: HelloRoam. The 20GB plan at $27.49 covers a 8-day moderate trip (12GB at 1.5GB/day) on the local network your handset finds. HelloRoam pairs a 180-day refund window with support in 63 languages for Vietnam travelers.
Our recommendation
Start with the math. 8 days at 1.5GB/day equals 12GB. The 20GB plan at $27.49 clears that bar with 8GB left over for unexpected video calls or uploads.
The Pick: 20GB at $27.49
#1 RecommendationThe 20GB plan costs $27.49 in the HelloRoam catalogue and connects to a local network's 5G network. Per-GB rate: $1.37/GB. That is the only per-destination price feed this site holds, so it is the only destination price we quote.
On plan shape and our published rubric, HelloRoam is the best fit of the 5 providers we score for a trip this size. Its own published entry rate is $3.50/GB, and it rates 8.7/10.
Who this plan fits
Travelers staying 8 days who use maps, messaging, and social media. Your daily usage sits around 1.5GB, totaling 12GB for the trip.
Why this plan
Trip-length match
1.5GB per day over 8 days totals 12GB. The 20GB plan adds 8GB of headroom beyond that target. That buffer covers photo uploads, group chats, and the occasional video call.
Per-GB value analysis
Vietnam sits low in the catalogue and the ladder is even. HelloRoam charges $3.49 for 1 GB, $7.49 for 3 GB, $11.09 for 5 GB, $19.31 for 10 GB and $27.49 for 20 GB, giving $3.49, $2.50, $2.22, $1.93 and $1.37 per gigabyte. An 8-day trip at the moderate 1.5 GB a day benchmark needs 12 GB, so the 20 GB tier at $3.44 a day is the fit and the 5 GB tier at $1.39 a day is the WiFi-heavy option. Vietnam's country record puts local daily use at 1.2 GB, under that benchmark. Unlimited costs $28.53 for 7 days, which is more than the 20 GB tier and buys no extra days, so the fixed plan wins unless daily use passes 3 GB.
| Tier | Price | Per GB | Best for |
|---|---|---|---|
| 1GB | $3.49 | $3.49/GB | Light use (maps, email) |
| 3GB | $7.49 | $2.50/GB | Light use (maps, email) |
| 5GB | $11.09 | $2.22/GB | Moderate use (social, browsing) |
| 10GB | $19.31 | $1.93/GB | Heavy use (streaming, work) |
| 20GB Pick | $27.49 | $1.37/GB | Heavy use (streaming, work) |
Provider score breakdown
HelloRoam scores 22.3 of 25 across the 5 rubric dimensions for Vietnam. 180-day refund window on unactivated eSIMs, tied for the longest. Support in 63 languages, more than the other four combined. The main trade-off: regional multi-country bundles are not available yet.
Operator attachment in Vietnam
Three operators carry Vietnam in HelloRoam's dataset: Viettel Mobile and Vinaphone with 5G labels, MobiFone with 4G. That puts Vietnam in the 68 multi-operator destinations rather than the 117 single-operator ones, so a profile has more than one place to land. The mean for the whole dataset is 1.48 operators per destination and the maximum anywhere is 4, which makes three a strong row. The order of the names is alphabetical and carries no meaning. No published source says which of the three a handset picks, and the dataset holds no speed figure, so a 5G label here is a capability the network supports rather than a rate you are promised.
Plan recommendation by usage tier
Each tier maps to a specific plan and provider for Vietnam.
Light user
Maps + messagingLight-use verdict for Vietnam: 4GB over 8 days. The 5GB plan at $11.09 ($2.22/GB) on a local 5G network covers email, maps and messaging. We pick HelloRoam for this tier because it scores 86 out of 100 on the published match formula. Limitation: regional bundles are not sold yet, so a multi-country route means several plans.
Moderate user
Social + browsingModerate-use verdict for Vietnam: 12GB over 8 days handles social feeds, navigation and daily browsing on the local network your handset finds. HelloRoam prices the 20GB tier here at $27.49 ($1.37/GB). Vietnam's good WiFi lets moderate users offload evening streaming and stay inside the 12GB budget. Holafly scores highest at this tier, 96 out of 100. Limitation: the absence of a per-GB tier means light travelers buy more than they need.
Heavy user
Streaming + callsHeavy-use verdict for Vietnam: 24GB over 8 days at 3GB/day. Unlimited runs $4.43/day on the Vietnam catalogue. Commit to 30 days there and the rate drops to $3.63/day, 18% off. Holafly scores 96 out of 100 at this tier. Limitation: it sells unlimited or nothing, so a light week costs the same as a heavy one.
Your Vietnam trip type, matched to a plan
Weekend, vacation, business, or backpacking. Each trip profile maps to a different plan.
Weekend (2-3 days)
A weekend in Vietnam runs 2 days, which is 1 GB at 0.5 GB a day. The catalogue prices the 1 GB tier at $3.49, or $1.75 a day across the trip. The published 3-day unlimited bundle costs $12.23 at $4.08 a day.
Vacation (7-14 days)
A vacation in Vietnam runs 8 days, which is 12 GB at 1.5 GB a day. The catalogue prices the 20 GB tier at $27.49, or $3.44 a day across the trip. The published 14-day unlimited bundle costs $55.20 at $3.94 a day.
Business (3-7 days)
A business trip in Vietnam runs 7 days, which is 21 GB at 3 GB a day. The 20 GB tier at $27.49 is the largest tier the catalogue sells for Vietnam and stops short of that figure. The published 7-day unlimited bundle costs $28.53 at $4.08 a day.
Backpacking (10-30 days)
A backpacking leg in Vietnam runs 30 days, which is 15 GB at 0.5 GB a day. The catalogue prices the 20 GB tier at $27.49, or $0.92 a day across the trip. The published 30-day unlimited bundle costs $108.98 at $3.63 a day.
Your Vietnam provider comparison
Not all providers perform equally in Vietnam. Coverage, pricing, and support quality vary by carrier routing and plan structure. Airalo wins destination reach outright at 200 published destinations, and it is the only fully published regional-bundle shape of the five. For scale on Vietnam pricing, the cheapest plan in our feed is 1GB at $3.49, from the catalogue. The largest tier we hold is 20GB at $27.49, also HelloRoam's. Airalo's own floor is $4.50/GB, above every rival, and support is live chat and email in 12 languages, with no round-the-clock hours. Stop counting gigabytes and Holafly becomes the obvious pick: unlimited days from a published $2.99/day, plus support that is live chat and email in 10 languages, around the clock. The bill for that simplicity is a 1GB daily tethering cap, reduced speed past the fair-use threshold, and no small plan at all if your usage turns out light. Saily is the one provider here whose plan ships with a VPN, from Nord Security, at no extra charge and from a published $3.99/GB. That is not a bonus in Vietnam, it is the thing that makes your corporate tools work. Support, though, is email in 1 language, with no round-the-clock hours. Price your Vietnam trip against Nomad first, because its $3.00/GB floor undercuts every rival here. Then decide whether you can live without an unlimited tier, without regional bundles, and with support that is email in 2 languages, with no round-the-clock hours. HelloRoam tops our rubric on the two dimensions that matter once a plan turns out wrong: 180 days to refund an unactivated eSIM, and support that is live chat, WhatsApp and email in 63 languages, around the clock. It wins neither price nor reach. Nomad's floor is lower at $3.00/GB, and Airalo's destination list is 14 longer.
Refund length is the column travelers underrate until a plan goes wrong. HelloRoam refunds an unactivated eSIM for 180 days. Holafly matches that at 180, Saily and Nomad allow 30, and Airalo allows 14, a 166-day gap between the ends of the table. Currency is the second gap and nobody else closes it: Checkout is priced in 31 currencies while the other four price in US dollars alone, adding 2 to 4 percent in bank conversion to a $27.49 order paid on a non-dollar card. Support runs 63 languages at HelloRoam against 25 across all four rivals combined. The catalogue publishes fixed tiers and unlimited days but no cross-border regional bundle, so Cambodian and Lao legs are priced separately.
Why the rubric leader finishes first
HelloRoam tops the rubric for Vietnam at 8.7 out of 10, computed the same way for all 5. The case for it is what happens when a plan does not fit: 180 days to refund an unactivated eSIM, and support you can reach, live chat, WhatsApp and email in 63 languages, around the clock. The case against it is reach and price. Airalo covers 200 destinations and sells regional bundles HelloRoam does not. Nomad starts at $3.00/GB. Both of those are real wins and neither is ours.
Alternative options
Different traveler profiles need different plans. Here are runner-ups for each use case.
1GB at $3.49
Cheapest available plan for light users. Good for 3 to 4 day trips where you only need maps and messaging. Per-GB cost: $3.49/GB.
20GB at $27.49
Largest fixed plan for video callers, streamers, and remote workers. Per-GB cost drops to $1.37/GB. That is $0.00 less per GB than the 20GB pick.
Unlimited at $4.43/day
Unlimited data at $4.43/day. Break-even vs the 20GB plan at day 7. Best for trips longer than 7 days, heavy streaming, and digital nomads.
| Days | Price | Per day | Discount |
|---|---|---|---|
| 1 | $4.25 | $4.25/day | 4% |
| 3 | $12.23 | $4.08/day | 8% |
| 7 | $28.53 | $4.08/day | 8% |
| 14 | $55.20 | $3.94/day | 11% |
| 30 | $108.98 | $3.63/day | 18% |
Regional bundle alternative
Multi-country travelers through Asia save with the Airalo Asialink (16 countries). One eSIM covers multiple destinations. Single-destination visitors get better rates with a Vietnam plan.
Your Vietnam data calculator
Match your daily habits to a plan tier. Most travelers fit the moderate profile.
- Maps and navigation
- Messaging and email
- Boarding passes
- Social media and photo uploads
- Navigation and ride-hailing
- Browsing and light video
- Video calls and streaming
- Remote work and cloud sync
- Laptop hotspot
Peak season data adjustment
Device setup
Before departure
Order your 20GB plan and install the QR code while on WiFi. Label the line "Travel Data" so you can identify it at a glance. The validity timer starts when you first connect in Vietnam, not at installation.
iPhone setup
- Settings > Cellular > Add eSIM
- Scan the QR code in your order email
- Label the line "Travel Data"
- Set as default data line
Samsung setup
- Settings > Connections > SIM Manager
- Add eSIM > Scan QR code
- Rename the line "Travel Data"
- Set as mobile data SIM
Google Pixel setup
- Settings > Network > SIMs
- Add SIM > Scan QR code
- Rename the line "Travel Data"
- Set as data SIM
After landing in Vietnam
Your eSIM activates on a local 5G network as soon as you leave airplane mode in Vietnam. Verify the connection in your phone's status bar. Disable data roaming on your home SIM to avoid fees.
Common Vietnam eSIM questions
Direct answers to the questions travelers ask most about Vietnam eSIM plans.
How Vietnam data adds up over 8 days
A 8-day trip to Vietnam needs 4 GB at the light benchmark of 0.5 GB a day and 12 GB at the moderate benchmark of 1.5 GB a day. The catalogue prices the 5 GB plan at $11.09 and the 20 GB plan at $27.49 for Vietnam. Heavy use at 3 GB a day comes to 24 GB, past the 20 GB tier that is the largest sold for Vietnam. Those three benchmarks are the same figures the quiz and the data calculator on this site read.
The tier that fits 8 days in Vietnam
A moderate traveler spending 8 days in Vietnam needs 12 GB at 1.5 GB a day. The catalogue prices the 20 GB plan at $27.49 for Vietnam, which is $1.37 per GB and $3.44 a day across the trip. That leaves 8 GB of headroom against the 12 GB estimate. The published operator list for Vietnam names MobiFone, Viettel Mobile or Vinaphone, and no published source says which one a handset selects.
Vietnam unlimited pricing beside the fixed ladder
The catalogue prices a 14-day unlimited bundle for Vietnam at $55.20, which is $3.94 a day. The fixed 20 GB tier costs $27.49 and covers the 12 GB a 8-day trip needs at the moderate benchmark. The fixed tier is the cheaper of the two here by $27.71. Unlimited bundles carry a fair-use policy rather than an open tap.
Published entry rates across the five providers
HelloRoam publishes a $3.50/GB fixed entry rate and takes checkout in 31 currencies, against 1 currency apiece at Airalo, Holafly, Nomad and Saily. Published fixed floors across the scored 5 read $3.00/GB at Nomad, $3.50/GB at HelloRoam, $3.99/GB at Saily, $4.50/GB at Airalo, with Holafly selling by the day at $2.99/day. The cheapest Vietnam plan in that catalogue is 1 GB at $3.49, a destination price rather than a published floor. Support runs in 63 languages there, against 12 at Airalo, 10 at Holafly, 2 at Nomad and 1 at Saily.
A travel eSIM beside a Vietnam local SIM
The catalogue prices a 1 GB eSIM for Vietnam at $3.49, installed before departure over home WiFi. The country record puts an airport SIM at $5-15 for 6-20GB / 15-30 days, with a counter wait of 10-15 min. Vietnam requires SIM registration, which a travel eSIM handles before you land. HelloRoam refunds an unactivated eSIM for 180 days, against 30 days at Saily and Nomad and 14 at Airalo.
Setting up a Vietnam eSIM in four steps
Buy the tier that matches the trip: the Vietnam ladder starts at $3.49 for 1 GB. Install the profile over home WiFi under Settings, Cellular, Add eSIM on iPhone, or Settings, Network, SIMs, Add eSIM on Android. Turn on data roaming for the travel line and leave the home line's data off. On arrival the profile attaches to a local network.
Your questions, answered
What is the best eSIM plan for Vietnam in 2026?
The 20GB plan at $27.49 on the local network your handset finds, a HelloRoam catalogue price. It covers 8 days of moderate use at $1.37/GB. 7 plans are available across 5 providers.
How do I choose between fixed and unlimited data for Vietnam?
Fixed data wins for trips under 7 days at moderate use. Unlimited at $4.43/day saves money if you use more than 3GB per day or stay longer than 7 days.
Which eSIM provider is best for Vietnam?
HelloRoam scores 22.3 of 25 for Vietnam across per-GB value, plan flexibility, buyer protection, support access, and destination reach, which is first of the five on this site's weighting. 180-day refund window on unactivated eSIMs, tied for the longest. Regional multi-country bundles are not available yet.
Can I switch plans mid-trip in Vietnam?
Yes. Buy a second eSIM through the provider app while in Vietnam. Most phones support 8+ eSIM profiles. Delete the expired plan to free a slot. You do not lose your home number.
How far in advance should I buy my Vietnam eSIM?
Buy 1 to 3 days before departure. Install the QR code over WiFi at home. The validity timer starts at first network connection in Vietnam, not at purchase. This gives you time to troubleshoot any installation issues before your flight.
Is the 20GB plan enough for streaming in Vietnam?
Streaming puts a traveler on the published 3 GB heavy band. Over 8 days that is 24GB. The 20GB plan falls short for daily streaming. Heavy streamers should consider 20GB or unlimited at $4.43/day.
What network does my Vietnam eSIM connect to?
The published attachment list for Vietnam holds 3 operators: MobiFone, Viettel Mobile or Vinaphone. The published list carries the 5G capability label, and it does not record which operator a given handset selects. Save offline maps for Vietnam before you fly.
Your Vietnam reading list
Full 5-provider comparison with pricing, ratings, and network analysis for Vietnam.
Answer 4 questions and get a personalized plan recommendation in 60 seconds.
Toggle your daily activities and get an exact GB estimate for your trip.
Browse all Asia destinations sorted by best per-GB value.
Four questions size a Vietnam plan
Answer four quick questions and we'll pick the right tier, provider, and price for your trip.