Two things decide whether your phone can use a travel eSIM, and you can check both in under two minutes. First, the phone must have eSIM hardware. Second, it must be carrier unlocked so it will accept a plan from a provider other than your original network. Pass both tests and any travel eSIM will install and run.
Most people only think about the first requirement and forget the second, which is why a phone that clearly supports eSIM sometimes still refuses a travel plan. Checking both up front means you buy with confidence and land already connected.
This guide gives you the quick dial code test, the settings menu check, the unlock check, and a model by model overview so you know exactly where your phone stands before you buy.
In this guide:
- The two requirements explained
- The 30 second dial code test
- Checking in your phone settings
- Making sure your phone is unlocked
- Which phones support eSIM
The two requirements explained
An eSIM is a small chip built into your phone that can be programmed with a mobile plan over the internet, replacing the plastic SIM card. For a travel eSIM to work, your phone needs that chip present and active, which is the hardware requirement. Every phone made in the last several years by the major brands includes it, but some budget and regional models do not, so it is worth confirming rather than assuming.
The second requirement is the one people miss: the phone must be carrier unlocked. A locked phone is tied to the network that sold it and will reject a plan from anyone else, including a travel eSIM. Hardware capability and unlock status are independent, so a fully eSIM capable phone can still be locked. You need both green lights. The carrier lock glossary entry explains locking in more detail.
The 30 second dial code test
The quickest way to confirm eSIM hardware is a universal dial code that works on almost every phone. Open the phone dialer and type the code made of star, hash, zero, six, hash. Your phone will instantly display its device identifiers.
If the screen shows an EID number, a long string usually 32 digits, your phone has an eSIM. The EID glossary entry explains what that identifier is. Alongside it you will see the IMEI, which every phone has whether or not it supports eSIM. So the rule is simple: EID present means eSIM capable, EID absent means physical SIM only. This test takes seconds and needs no internet connection.
Checking in your phone settings
If the dial code is inconclusive, the settings menu confirms it directly. The wording differs slightly by brand, but the presence of an add option is the tell.
| Phone | Where to look | What confirms eSIM support |
|---|---|---|
| iPhone | Settings, then Mobile Service or Cellular | An Add eSIM or Add Data Plan option |
| Samsung Galaxy | Settings, then Connections, then SIM manager | An Add eSIM or Add mobile plan option |
| Google Pixel | Settings, then Network and internet, then SIMs | A Download a SIM instead or Add SIM option |
| Other Android | Settings, then Network and internet, then SIMs | Any Add SIM or Download a SIM wording |
If you can start the flow to add or download an eSIM, the hardware is there. Update your phone to the latest software first, because on a few models eSIM support arrived in a later update and the menu only appears once you are current.
A word on why the menu wording differs so much between brands: there is no single industry standard label for the feature, so manufacturers name it whatever fits their settings design. Apple leans on Add eSIM or Add Data Plan, Samsung uses Add mobile plan, and Google prefers Download a SIM instead. All three do exactly the same thing, which is begin the process of downloading a carrier profile onto the embedded chip. If you see any option along these lines, stop worrying about the exact phrasing; the presence of the option is the confirmation. If your settings show only a physical SIM tray and no add or download option anywhere in the mobile or network section even after updating, that is a reliable sign the model simply does not include eSIM hardware, and a physical SIM will be your route to data abroad instead.
Making sure your phone is unlocked
A carrier locked phone will pass every hardware test above and still reject a travel plan, so this check matters just as much. There are a few ways to confirm your phone is unlocked:
- Ownership clue. A phone bought outright, or one whose instalment plan or contract is fully paid off, is almost always unlocked. A phone still being paid off through a carrier may be locked.
- Settings check. On iPhone, Settings then General then About shows a Carrier Lock line reading No SIM restrictions when unlocked. Many Android phones show a similar status under About phone or SIM status.
- Ask the carrier. The definitive answer is from the network that sold the phone. They can confirm the status and unlock it, usually for free once eligible, though it can take a day or two, so do this well before travel.
If your phone turns out to be locked, request the unlock early. It is the one compatibility issue that cannot be fixed at the last minute, because the unlock is granted by your carrier on their timeline, not yours, and can take a day or two to process even once you are eligible. Leaving it to the night before departure is the single most common way a fully capable phone still ends up stuck on roaming abroad, so treat the unlock as the first thing to sort out rather than the last.
Which phones support eSIM
As a general guide for 2026, the following covers the vast majority of travellers, though the only reliable check is your exact model and region.
- iPhone: Every model from iPhone XR and XS onward supports eSIM. US iPhone 14 and later are eSIM only with no physical tray, so a travel eSIM is the only option abroad.
- Google Pixel: Pixel 3 and later support eSIM in most regions, with the newer models handling multiple eSIM profiles smoothly.
- Samsung Galaxy: Galaxy S20 and later, recent Note, Z Fold and Z Flip models support eSIM, though some regional variants differ.
- Other Android: Many recent Motorola, Oppo, Huawei and Sony flagships support eSIM, but budget lines often do not. Check the specific model.
The catch worth repeating is regional variation: the identical model number can ship with eSIM in one country and without it in another, so always verify your own device rather than trusting the model name alone. Our device compatibility page lists supported phones, and the eSIM for iPhone guide and eSIM for Android guide go deeper on each platform.
Once you have confirmed both eSIM hardware and an unlocked phone, you are ready to buy. Prepaid travel eSIM plans from Viasimo install by QR code in minutes and work on any compatible, unlocked phone. Browse the destinations page to find a plan for your trip, whether you are heading to the USA or across Europe, and you will land connected.
