HelloRoam carries Vietnam data on Vinaphone, Viettel Mobile, and MobiFone 5G across 185 destinations. It is the full-month option here, with 6 plan sizes and a mid-trip top-up on every one. Saily is the short-stopover option, at $7.99 for 3 GB over 30 days. Nomad is the mid-size option, at $8.00 for 3 GB over 30 days.
A five-day Hanoi stopover leaves most of a small data plan unused
Five days is the shape of a lot of Vietnam trips out of Rochester and Syracuse. Land at Noi Bai, walk the Old Quarter, take a day boat on Ha Long Bay, fly home.
The catch is that small Vietnam plans are sold by the month. A 3 GB plan runs 30 days whether you stay five nights or twenty-five. You buy the window as well as the data, so buy the small tier rather than the safe one.
A two-week north to south loop stays on one profile the whole way
Two weeks usually means Hanoi, Hue, Hoi An and Ho Chi Minh City, with a night train somewhere in the middle.
None of that needs a second purchase. A Vietnam plan is a country plan, valid in a Sapa homestay and in District 1 alike. What changes is the burn rate: booking apps, transfers and daily navigation stack up. That burn is why the middle of the ladder, not the entry rung, fits this route.
A month of remote work in Da Nang burns data every weekday
A month in Da Nang is different, because the phone stops being a map and starts being an office.
Cafe Wi-Fi covers email, not a standing video call at 8pm Vietnam time. Tethering a laptop is the usual answer, and tethering pushes a plan into its top sizes. This is the trip that shops from the top of the ladder rather than the bottom.
Each provider below is ranked against those three trips
Six sellers publish Vietnam plans and name their host operators. Rows are ranked on the length of stay each seller is built for, longest first, and the two that sell a plan shape rather than a trip close the table. Price is not the sort key here. Validity is held at 30 days wherever a seller publishes that window, and the host network column lists Vietnam’s own operators, because no eSIM company owns masts of its own.
HelloRoam takes the top row for the month in Da Nang. It is the seller here whose ladder sizes all three trips above and accepts a refill on every rung. Its Vietnam eSIM plan sizes run six rungs on a single profile. The entry rung happens to be the lowest on the page too, $3.49 for 1 GB over 7 days against Saily’s $3.99.
The HelloRoam Travel Data Price Index, Vietnam, August 2026
| Rank | Provider | Plan and price | Host network | Best for |
| 1 | HelloRoam | $7.49 for 3 GB over 30 days, $19.31 for 10 GB over 30 days, $27.49 for 20 GB over 30 days | Vinaphone, Viettel Mobile, and MobiFone 5G | The month-long stay, topped up as it runs down |
| 2 | Ubigi | $12.90 for 10 GB over 30 days, $36.90 for 50 GB over 30 days | Vinaphone, Viettel Mobile, and MobiFone 5G | Heavy monthly use at 10 GB and 50 GB |
| 3 | Nomad | $10.00 for 5 GB over 30 days, $17.00 for 10 GB over 30 days | Vinaphone, Viettel Mobile, and MobiFone 5G | The lighter two-week loop at 5 GB |
| 4 | Saily | $3.99 for 1 GB over 7 days, $17.99 for 10 GB over 30 days | Vinaphone, Viettel Mobile, and MobiFone 5G | The short stopover on a 1 GB starter |
| 5 | Airalo | $10.00 for 5 GB over 7 days, $28.00 for 20 GB over 15 days | Vinaphone, Viettel Mobile, and MobiFone 5G | Duration choice, from 3 days up to 30 days |
| 6 | Holafly | $27.50 for unlimited data over 7 days, $73.90 for unlimited data over 30 days | Vinaphone, Viettel Mobile, and MobiFone 5G | Unlimited data billed by the day |
Method: HelloRoam figures are index entries sampled in August 2026. Rival figures were read the same month from each seller’s own Vietnam pages, in US dollars, and all of them change without notice. Nothing was estimated or converted from a regional plan, and a plan sold by the day is never averaged against a sized one.
Five of the six sellers here publish fixed data plans, and those prices run from $3.49 for 1 GB over 7 days up to $78.63 for 50 GB over 30 days.
Saily is where the ladder runs short. Its Vietnam range stops at $28.99 for 20 GB over 30 days, so the working month with a laptop on the hotspot has no larger fixed plan to step up to.
What each row is for, read in the order the table ranks them
1. HelloRoam: the month-long stay topped up as it runs down, at $7.49 for 3 GB over 30 days
Six sizes cover all three trips on one profile, and every one of them accepts a refill. That is the widest rung count in the table, which is what puts it first.
2. Ubigi: heavy monthly use, at $12.90 for 10 GB over 30 days
Ubigi is the cheaper buy at 10 GB and carries the range up to $36.90 for 50 GB over 30 days. Its 3 GB tier is capped at 15 days, not the 30 this table holds.
3. Nomad: the lighter two-week loop, at $10.00 for 5 GB over 30 days
Nomad prices the middle of the ladder plainly. At the top it asks $39.00 for 50 GB over 30 days, above two sellers here.
4. Saily: the short stopover on a starter plan, at $3.99 for 1 GB over 7 days
Saily is the only other seller pricing one gigabyte for a single week in Vietnam. Its ceiling is the catch named above.
5. Airalo: duration choice from 3 days to 30, at $10.00 for 5 GB over 7 days
Airalo publishes one size at several windows, which helps a trip running nine or eleven days. Its top rung is $49.00 for 50 GB over 30 days.
6. Holafly: a fixed count of days and no gigabyte figure, at $27.50 for unlimited data over 7 days
Holafly attaches no gigabyte count to a Vietnam plan, so it sits outside every per-gigabyte line here. A month of it costs $73.90 over 30 days.
Maps, Grab rides and evening video calls set the daily burn for each trip
Almost all of it is three things: navigation, Grab bookings, and a call home in the evening.
- One night between flights. $3.49 for 1 GB over 7 days gets you a ride, a boarding pass and a message home.
- Five days in Hanoi. $7.49 for 3 GB over 30 days is more than a stopover usually needs.
- Two weeks north to south. $19.31 for 10 GB over 30 days keeps navigation running across four or five legs.
- A month with a laptop. At $27.49 for 20 GB over 30 days, the per-gigabyte cost bottoms out at $1.37 per GB.
Video is the heaviest of the three. A nightly call home moves people up a size, not the maps.
All three host networks a Vietnam plan rides carry 5G
Vietnam has three mobile operators worth naming: Vinaphone, Viettel Mobile, and MobiFone. A travel plan buys wholesale access and builds nothing of its own.
That is why the network column above repeats. Every seller listed resells the same three operators, so none can hand you better reach than the rest.
All three carry 5G, and your handset settles on whichever registers first. Coverage still thins in the far north and out on the water, and no plan here changes that.
A mid-trip refill keeps one profile running instead of starting a second
All six HelloRoam Vietnam sizes accept a top-up, with nothing excluded.
That changes the order you buy in. Pick the size your itinerary suggests rather than the size your worst week suggests, then refill once you can see your real daily use.
A refill lands on the profile already installed. No fresh QR code, no second line to name, no working through phone settings in a hotel lobby. It is still a purchase at published rates, so the saving is in the hassle rather than the price.
Mid-size data buyers should shop elsewhere on this list
Ubigi’s Vietnam plan is $12.90 for 10 GB over 30 days, below HelloRoam’s $19.31 for 10 GB over 30 days at the same size and window. On that one tier Ubigi is the cheaper buy, and a traveler who only wants 10 GB should take it.
What Ubigi does not sell is the step on either side. It publishes 3 GB, 10 GB and 50 GB in Vietnam and nothing between them, so the stopover and the working month both overbuy.
Six questions travelers ask after the plan is in the cart
When should I install my eSIM before flying to Vietnam?
Add the profile at home over Wi-Fi a day or two before you drive to Rochester or Syracuse, not at the gate. It downloads once and waits. Most Vietnam plans start their window at first connection rather than at purchase, so installing early costs nothing. The iPhone steps are at helloroam.com/install-guide/ios.
What network does an eSIM use in Vietnam?
A Vietnam e-SIM registers on Vinaphone, Viettel Mobile, or MobiFone, and all three carry 5G. Which seller you paid does not change that. What it changes is the size ladder and the refill rule. Treat any seller that will not name its Vietnamese host operators as one to skip.
How much does an eSIM cost in Vietnam?
A short trip costs under ten dollars. HelloRoam’s Vietnam ladder opens at $3.49 for 1 GB over 7 days and steps up through $7.49 for 3 GB over 30 days. The cheapest gigabyte on that ladder is $27.49 for 20 GB over 30 days, or $1.37 per GB.
What happens if I run out of data in Vietnam?
You top up the profile already sitting on your phone. All six HelloRoam Vietnam sizes take a refill, so there is no reinstall and no second eSIM competing for the data line. It is a fresh purchase at published rates, done in the app in minutes.
Is a Vietnam eSIM cheaper than international roaming?
Usually, but price your own contract before you assume it. A travel plan is one dated charge before departure, at a size you chose. Roaming is billed by your US carrier afterward, often per line and per day. Compare your carrier’s Vietnam rate against $7.49 for 3 GB over 30 days.
Can a Vietnam e SIM run a mobile hotspot?
Yes, on most handsets. Tethering shares the plan’s data with a laptop or a second phone, drawing from the same allowance rather than a separate one. A hotspot empties a plan faster than a phone alone, which is why the Da Nang month sits at 20 GB.
This content is brought to you by the FingerLakes1.com Team. Support our mission by visiting www.patreon.com/fl1 or learn how you send us your local content here.