The short answer
You hold an O2 or Three contract and a flight to Hanoi or Ho Chi Minh City, and the question is what your carrier charges in Vietnam. I read both on 10 November 2026: O2 does not name Vietnam on its travel bolt-on, and Three charges £8 a day on newer plans. I priced the travel eSIMs on 10 November 2026. For two weeks or more I would buy Ringo Light and keep my own SIM in for calls and texts.
Unlimited data at full speed for 2 weeks at $22.99 or 30 days at $42.99, nothing renews. Airalo asks $48 for 15 days and $69 for the month.
10 GB for 30 days at $13 on VNPT with 5G. Ubigi sells no unlimited plan for Vietnam.
Unlimited for 3 days at $11.50 on its Xin Chao plan, and buckets from $4 for 1 GB.
Days, not gigabytes, no daily cap stated for your own phone, on Vinaphone. $27.50 for a week; sharing limited to 1 GB a day.
Prices read on 10 November 2026: Airalo, Holafly, Saily, Nomad, Ubigi, O2, Three, Ringo Light, European Central Bank on their own sites or listings, Ringo Light from its catalogue. All in US dollars unless stated. Treat every number as a snapshot.
See the full price index for every country.
Travelling further? Compare the best eSIM for Asia and the eSIM for Asia-Pacific.
The prices, charted
US dollars, 10 November 2026. The rivals sell 15 days, Ringo Light 2 weeks. Nomad sells 10 days at $33; Ubigi sells no unlimited.
The 30-day unlimited plan at each brand. Ringo Light is unlimited data at full speed. Nomad and Ubigi sell no 30-day unlimited.
Holafly sells no buckets. Ringo Light sells no bucket either: its 2 weeks is unlimited and lasts 2 weeks, not 30 days.
Side by side
Swipe to compare →
Get Ringo Light for Vietnam, from $8.99.
Installed once, next to your own SIM. Your eSIM arrives by email in seconds.
- 7 days $8.99
- 2 weeks $22.99
- 30 days $42.99
- 90 days $97.99
We sell data eSIMs for now to fund the full Ringo service. Ringo is self funded. Every plan bought here pays for the build of one plan that works everywhere.
Want to keep your own number abroad?
That is the full Ringo service: one plan that works everywhere, with your own number included.
It is a separate product from Ringo Light and it is still being built, so it is not on sale yet. Join the waitlist to hear when it opens.
What to do in Vietnam on a trip from Britain, and what your phone needs for it
Eight places most first trips include, from Hanoi in the north to the Mekong Delta in the south, with the one thing your data does for you at each. The main towns and the tourist routes between them have good 4G, and 5G in the big cities.
Roam with your carrier, or buy an eSIM
O2 Travel is the bolt-on most Brits know, at £7 a day in 75 destinations outside Europe. On 10 November 2026 the page names Thailand, Singapore, Malaysia and Indonesia among its Asian destinations, but not Vietnam. It says a destination it does not cover is charged at standard rates, and I could not read those rates, so I give no O2 price. If you are on O2, I would ask before you fly.
Three lists Vietnam in Go Roam Around the World, for Pay Monthly and Pay As You Go alike. The daily charge is £8 (about $11) if you joined or upgraded on or after 18 December 2025, and £7 if you joined between 1 October 2021 and 17 December 2025. At the ECB reference rate of 10 November 2026, £1 = $1.34, three days at £8 is £24 (about $32), two weeks £112 (about $150) and thirty days £240 (about $322). On the £7 rate that is £21 (about $28) for three days and £98 (about $131) for two weeks.
Ringo Light sells three trips for Vietnam: $8.99 for 7 days, $22.99 for 2 weeks and $42.99 for 30 days. It sells no 3-day plan. Two weeks is about $150 on Three and $22.99 on Ringo Light, and a month is about $322 against $42.99. The rivals are above Ringo Light too: for 15 days Airalo asks $48, Saily $48.99 and Holafly $51.50, and for a month $69 to $76.50.
What Three and Airalo win is real. For a long weekend, Airalo sells 3 days of unlimited at $11.50, against about $32 on Three and no 3-day plan at Ringo Light. For a single day, Three at about $11 is fair. Three also keeps your UK number ringing, brings calls and texts, and needs no install. The cost shows up on a longer trip, which is most Vietnam trips from Hanoi to Ho Chi Minh City.
Networks in Vietnam, and what changes for a visitor from the UK
Airalo, Holafly and Ubigi ride VNPT. Nomad lists Vietnamobile, MobiFone and Vinaphone. Saily does not name its network. Ringo Light uses a local partner network. Viettel, the largest, is not named by any of the brands I priced, and the main towns and tourist routes still have good 4G.
The carrier terms differ. O2 Travel does not list Vietnam on 10 November 2026. Three sets Vietnam in Around the World, and says Go Roam is for UK residents visiting for short periods, with up to 12GB of your data allowance in any Go Roam destination on Pay Monthly. The pages I read do not state a hotspot rule, so I would ask Three before you tether a laptop for a month.
The travel eSIMs here are data only, with no Vietnamese number. Calls go over apps that use data, such as WhatsApp or FaceTime. Grab needs data, not a local number.
If you want a data bucket: Ubigi
- Ubigi, $13 for 10 GB. The cheapest 10 GB for 30 days, on VNPT with 5G. Its 20 GB is a monthly plan that renews.
- Nomad, $17 for 10 GB. On Vietnamobile, MobiFone and Vinaphone, 20 GB for $25, and 50 GB for $39.
- Saily, $17.99 for 10 GB. 20 GB at $28.99.
- Airalo, $18 for 10 GB. Its Xin Chao plan rides VNPT. 20 GB for $29.
- ✓Ringo Light, no buckets. Its 2 weeks is unlimited for $22.99 and its 30 days unlimited for $42.99. For a fixed 10 GB, Ubigi at $13 is cheaper, and I would rather you read that here than at checkout.
What Ringo Light is
Ringo Light is Ringo's own data eSIM, and I write for Ringo, so weigh that. It is sold to fund the full Ringo, one plan that works everywhere with your own number ported onto it. For Vietnam it sells three trips: 7 days at $8.99, 2 weeks at $22.99 and 30 days at $42.99, all unlimited data at full speed. Nothing renews. The eSIM arrives by email in seconds as a QR code and installs in one scan, with one payment and no app.
It is data only, with no number, no calls and no texts. It sits beside your own SIM, so your UK number stays on for calls and texts if you leave roaming on for those, and I would check how your carrier bills that day before leaning on it.
The card to buy it is further up this page, just after the side-by-side table.
Pick by trip
Airalo unlimited, 3 days, $11.50. Ringo Light sells no 3 days, and Three would be about $32.
Ringo Light unlimited, 2 weeks, $22.99, against about $150 of Three daily charges.
Ubigi 10 GB for 30 days at $13.
Ringo Light unlimited, 30 days, $42.99, against about $322 on Three.
Keep your own SIM in beside the eSIM. Three includes UK calls and texts in its day charge, which I would confirm with Three before you fly.
Frequently asked questions
How we compared, and our sources
Airalo, Holafly, Saily, Nomad, Ubigi, O2, Three, Ringo Light, European Central Bank, Ringo Light
We priced Airalo, Holafly, Saily, Nomad, Ubigi and Ringo Light for Vietnam on 10 November 2026, all on the same day, in US dollars. Each rival's price comes from its own website where it showed dollars, otherwise from an esimdb.com listing, and every source and its date is listed below. Ringo Light's prices come from the catalogue our checkout charges.
We compare the trips people actually book: a week, two weeks and a month of unlimited data, and a 10 GB bucket. We read each brand's fair use and speed rules and quote them as the brands state them. We did not run speed tests, so this page makes no speed claims for any brand.
Ringo Light is our own product. We put it in the table on the same terms as everyone else, and where a rival is the better buy the page says so.
Left out: Maya Mobile. We could not read its own prices for this country on the day, so it stays out rather than being guessed.
- Airalo: www.airalo.com/vietnam-esim?currency=USD, unlimited in dollars on the site, read 10 November 2026; buckets from esimdb.com/vietnam/airalo, listing dated 8 November 2026
- Holafly: esim.holafly.com/esim-vietnam/, price table on the site, read 10 November 2026
- Saily: saily.com/esim-vietnam/, prices in dollars on the site, 25 October 2026; not readable on 10 November 2026, figures kept from 25 October
- Nomad: www.nomadesim.com/vietnam-esim, prices in dollars on the site, read 10 November 2026
- Ubigi: cellulardata.ubigi.com/destinations/vietnam/, own page mixes dollars and euros on 10 November 2026, so figures are from esimdb.com/vietnam/ubigi, listing dated 4 November 2026
- O2: www.o2.co.uk/international/o2-travel, O2 Travel bolt-on page, read 10 November 2026: £7 a day in 75 destinations outside Europe, for Pay Monthly; South Korea and Vietnam are not among the Asian destinations the page names, and the page says a destination it does not cover is charged at standard rates, which I could not read (the rates page did not load)
- Three: www.three.co.uk/go-roam, Go Roam daily charges and the 12GB fair use limit at three.co.uk/go-roam and three.co.uk/support/roaming-and-calling-abroad/roaming-abroad/go-roam, Vietnam in Around the World at three.co.uk/support/roaming-and-calling-abroad/roaming-abroad/roaming-destinations, read 10 November 2026
- Ringo Light: ringoesim.com/vietnam, the catalogue the checkout charges, read the same day
- European Central Bank: www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml, euro reference rates of 10 November 2026, the latest published, used for the dollar figures (£1 = $1.34); the rates page at ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rate/html/index.en.html returned not found
- Ringo Light: our own catalogue, the prices the checkout charges on 10 November 2026.
Written and priced by the Ringo team. Prices change often; if you spot one that has moved, tell us through the contact page and we will update the table.
