The short answer
Ho Chi Minh City to Phnom Penh by bus or boat, then Siem Reap for the temples, is the Vietnam and Cambodia trip I priced. I read six regional plans on 25 October 2026, checked the fine print on unlimited, and set them against Ringo Light's two country plans. For two weeks or a month across both, I would buy the Ringo Light Asia plan.
One eSIM for Vietnam and Cambodia, unlimited data at full speed, 2 weeks at $34.99 or 30 days at $59.99, nothing renews. Airalo asks $49 for 15 days and $73.50 for the month.
For a quick run over the border: 3 days of unlimited at $11.50, with 3 GB a day at full speed, then 1 Mbps.
For light use on the road: 10 GB for 30 days at $21 and 20 GB for 45 days at $35 (on sale, regular $40).
A week across both countries with 25 GB at full speed for $25, then 2 Mbps. 20 GB a month for $19 if you are happy with a plan that renews.
Prices read on 25 October 2026: Airalo, Holafly, Saily, Nomad, Ubigi 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.
The prices, charted
Asia regional plans that cover both, US dollars, 25 October 2026. Ringo Light sells 2 weeks, the others 15 days. Ubigi's 15 days is 30 GB at full speed, then 2 Mbps. Nomad sells no two-week unlimited; its longest is 10 days at $29.
The 30-day regional plan at each brand. Ubigi's month is 60 GB at full speed, then 2 Mbps. Nomad sells no 30-day unlimited.
Holafly sells no buckets. Ringo Light sells no bucket either: its 2 weeks is unlimited, so it lasts 2 weeks, not 30 days.
Side by side
Swipe to compare →
Get Ringo Light for Vietnam and Cambodia, from $21.99.
Installed once, next to your own SIM. Your eSIM arrives by email in seconds.
- 7 days $21.99
- 2 weeks $34.99
- 30 days $59.99
- 90 days $73.99
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What to do in Vietnam and Cambodia, and what your phone needs for it
Eight places that tend to fill a trip through Vietnam and Cambodia, four in each country, with the one thing your data does for you at each. One Asia eSIM works at every stop.
One plan for both countries: Ringo Light
The usual route runs south to north: Ho Chi Minh City, the Mekong, a border post, Phnom Penh, then Siem Reap. A regional eSIM is already on when you cross it. Two country eSIMs mean a second purchase and a second install, usually on hotel wifi in Phnom Penh.
Ringo Light's Asia plan is $34.99 for 2 weeks and $59.99 for 30 days, nothing renews. For about two weeks of unlimited on a regional plan I read Ubigi at $45 for a fixed 30 GB at full speed, Airalo at $49, Holafly at $51.50 and Saily at $54.99. For a month, the rivals run $66 to $86.99.
The sum is the clearest case in this series. Vietnam's 2 weeks is $22.99 and Cambodia's $37.99 on their own pages, $60.98 together, against $34.99 for the Asia trip that covers both. For a month, Vietnam's 30 days is $42.99 and Cambodia's $59.99, $102.98 together, against $59.99 for Asia.
Even for Cambodia alone, the Asia plan at $34.99 for 2 weeks costs $3 less than the Cambodia plan at $37.99, and the month is the same $59.99. If I were buying for Cambodia only, I would still choose Asia.
Which plans cover both countries
Ringo Light covers both. Vietnam and Cambodia are on its list of 20 countries, on one eSIM at one price.
For the rivals I rely on the parent's counts: Airalo 18 countries, Holafly 16, Saily 22, Nomad 14, Ubigi 17, with the few exclusions it names, none of them Vietnam or Cambodia. I could not confirm Vietnam and Cambodia one by one on each rival's list on the day. Cambodia is the one I would check twice, because smaller markets are where regional lists differ.
If you want a data bucket: Nomad or Airalo
- Nomad, $21 for 10 GB. The cheapest 10 GB on its 14-country APAC plan, and 20 GB for 45 days at $35 (on sale, regular $40).
- Airalo, $25 for 10 GB. Asialink, 18 countries, 20 GB for 30 days at $39, buckets from $4 for 1 GB.
- Ubigi, $28 for 10 GB. Best Asia, 17 countries. Its 20 GB for $19 is a monthly plan that renews until you stop it.
- Saily, $35.99 for 10 GB. Asia and Oceania, 22 countries, no 20 GB bucket on its listing. Read on saily.com, 25 October 2026.
- ✓Ringo Light, no buckets. Its 2 weeks is unlimited for $34.99 and its 30 days unlimited for $59.99. For a fixed 10 GB, Nomad and Airalo are cheaper, and for 20 GB so are Nomad, Airalo and Ubigi's monthly plan. I would buy Ringo Light for unlimited, not for a bucket.
What Ringo Light is
Ringo Light is the data eSIM I write for, so weigh what I say about it. It is sold to fund the full Ringo, one plan that works everywhere with your own number ported onto it. For Asia it sells two trips across 20 countries, Vietnam and Cambodia among them, both unlimited data at full speed: 2 weeks at $34.99 and 30 days at $59.99. Nothing renews. The eSIM arrives by email in seconds and installs in one scan, no app.
The card to buy it is further up this page, just after the side-by-side table.
Pick by trip
I would buy Airalo unlimited, 3 days, $11.50. Ringo Light sells no 3 days on the Asia plan.
I would buy Ubigi's week with 25 GB at full speed for $25. Ringo Light has no week; its 2 weeks is $34.99.
I would buy Ringo Light unlimited, 2 weeks, $34.99, less than any rival charges for two weeks.
I would buy Ringo Light unlimited, 30 days, $59.99.
I would buy Nomad 10 GB for 30 days at $21, if its 14 countries include both of yours.
None of these travel plans does that. The full Ringo, which Ringo Light funds, ports the number you have.
Frequently asked questions
How we compared, and our sources
Airalo, Holafly, Saily, Nomad, Ubigi, Ringo Light
We priced Airalo, Holafly, Saily, Nomad, Ubigi and Ringo Light for Vietnam and Cambodia on 25 October 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/asia-esim?currency=USD, Asialink unlimited, 18 countries and the 3 GB daily cap read on the site in dollars, 25 October 2026; 10 GB and 20 GB buckets from esimdb.com/vietnam/airalo, listing dated 4 October 2026
- Holafly: esim.holafly.com/esim-asia/, prices in dollars and the 16-country list on the site, 25 October 2026
- Saily: saily.com/esim-asia-and-oceania/, Asia and Oceania plans, prices in dollars on saily.com, read 25 October 2026
- Nomad: www.nomadesim.com/apac-esim, Regional APAC plans, prices in dollars from the page itself, read 25 October 2026; 20 GB for 45 days is on sale, $40 regular
- Ubigi: cellulardata.ubigi.com/rates-and-coverage/best-asia-data-plans/best-asia-unlimited-30-days/, Best Asia plan pages on cellulardata.ubigi.com, 25 October 2026: 7 days $25, 15 days $45, 30 days $66, 10 GB $28, 20 GB a month $19
- Ringo Light: our own catalogue, the prices the checkout charges on 25 October 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.
