Two Travel eSIMs Can Put You on Different Carriers in One Country

Travel eSIM comparisons argue about price. They rarely say which local carrier the eSIM roams on, and that decides whether your data works outside the capital. In two countries below, two of the biggest providers give different answers.

The same country, a different carrier

Read on 13 September 2026 from each provider’s own country page.

Most rows overlap. Two do not.

Philippines. Airalo names Smart as the primary network. Nomad states “Network for Philippines: Globe”. Smart and Globe are the country’s two main rivals, so your choice of provider decides which one you arrive on. Their coverage of the smaller islands is a question for each operator’s own map.

Indonesia. Airalo names its primary network as “3SinyalKuatHemat(Hutchinson)”, the operator sold locally under the 3 brand. Nomad names Telkomsel. These are different companies, and Indonesia has some seventeen thousand islands. Neither provider publishes a coverage map, so if you are going beyond Java and Bali, check the operators’ own maps before you choose.

Ubigi. Its operator list, read on 1 October 2026, names Dito and Smart for the Philippines. That shares one network with Airalo and adds a third carrier neither of the others lists. For Indonesia it names “Indosat Ooredoo Hutchison (IOH)”. Whether that is the same network as Airalo’s Hutchison entry is unclear, as the next section explains.

Vietnam: even published names are hard to compare

The Vietnam row may not be a disagreement at all. Airalo names VNPT, and Nomad’s list includes Vinaphone. The names are related in Vietnamese telecoms, and neither page says whether they mean one network or two.

Providers publish a mix of group names, brand names and marketing strings, with no shared vocabulary. Airalo’s Indonesian entry is literally “3SinyalKuatHemat(Hutchinson)”. Comparing two providers takes work the providers could have done.

Who publishes host networks

Of the four providers checked, three publish them.

Nomad states them on each country page, in the form “Network for Thailand: True / AIS / dtac”, and lists every partner rather than one.

Airalo has the most structure. A labelled field, whose tooltip reads “Shows primary network the eSIM uses”, names the primary network, with a separate count of the others. A named primary is more useful than a flat list because it is what you will probably attach to first.

Saily publishes no per-country answer. Its Japan page says the plan is “powered by partnerships with local operators including KDDI and SoftBank”. The word including leaves the list open and the actual carrier unstated.

Ubigi keeps one page it describes as “the complete list of operators used by Ubigi in each country”, naming every country’s networks. When this article was first checked, those names did not resolve, so nothing was claimed. On 1 October 2026 they did. The list is its own page, linked from the site footer, and the plan pages we read the same day for the Philippines, Japan, Thailand and Indonesia name no operator. With Ubigi you look the network up before buying, because the price page does not show it.

Nomad and Ubigi pay us a commission. Airalo publishes this as well as anyone and pays us nothing: we applied to its programme and were turned down.

The table goes out of date

Providers change roaming partners quietly, with no announcement or changelog. A figure checked in September can be wrong by December while the page it came from still displays confidently.

The table shows that providers differ, which will stay true. As a directory of who uses what, it will not. The links go to the providers’ own pages for that reason.

Ask your phone

Your phone knows which network you are on, and it costs nothing to look.

• iPhone: the carrier name shows in the status bar, and in full under Settings, then Mobile Service, then your travel plan.
• Android: Settings, then Network and internet, then SIMs, then the active eSIM.

This is the network you are attached to now, so it already accounts for any partner your provider switched to last month.

Check in the first ten minutes, while you are still at the airport and still have options. If you landed on the carrier with the thinner rural footprint for where you are going, a local SIM is easy to buy at that point, and so is a top-up on a second eSIM. Three days later, in a town where it does not work, both are hard.

When it matters

For a city trip it barely does. Every network above works in Bangkok, Tokyo and Manila, so compare price instead. Choosing between an eSIM, a local SIM and roaming and the pricing shapes of Saily and Nomad cover that.

It matters in thin-coverage areas: eastern Indonesia, the smaller Philippine islands, rural Hokkaido, the Vietnamese highlands. There the carrier is the product, and price differences between providers are small next to whether you have a signal.

Pick a provider that tells you which network you get, and check it on the page before you pay. Nomad prints it on every country page. If you are leaning towards Ubigi, open its operator list for your country first, because its plan pages leave the network out.

We have affiliate arrangements with Nomad and Ubigi and earn a commission if you buy through our links. Airalo pays us nothing.