ConnectivityBy Clever Tourists · Published · Last updated
Landing in a new country and needing data before you've even found the exit is a solved problem three different ways now, and the annoying part is that none of them is universally best. Here's how eSIMs, physical local SIMs, and roaming on your home plan actually differ, and which one made sense on which leg of a 20-country trip.
Free toolConvert to your own currency at live rates →Live mid-market rates for all 17 currencies we used, so you can see what a price actually costs.An eSIM is a digital SIM profile you install through an app or QR code before you even land — no kiosk, no queue, no plastic to lose. The trade-off is that it's usually a data-only plan tied to an app-based account, not a real local phone number, and it needs a phone released in roughly the last several years with eSIM support (worth checking before you buy one, not after).
A physical local SIM is the opposite trade-off: you need to actually find a shop or airport kiosk, sometimes show your passport to register it (a legal requirement in a number of countries), and swap it into your phone. In exchange you usually get a real local number, often the best per-gigabyte rate in that country, and a plan a local carrier's own shop can help you troubleshoot in person.
Roaming on your home carrier's plan is the least effort and, for most US plans, the most expensive by a wide margin unless your provider has a specific international add-on. It's the right call for a single short trip where buying and swapping a SIM isn't worth the hassle for two or three days of data.
eSIMs win for the first day or two in any new country, or anywhere finding a physical SIM shop is genuinely inconvenient (an overnight arrival, a rural border crossing, a short stopover). They're also the easy choice if you're keeping your regular number active on your phone's physical SIM slot for calls and two-factor codes while using the eSIM purely for data.
Physical local SIMs win on longer stays in one country, where the better per-gigabyte rate and a real local number (useful for booking restaurants, ride apps, or anything that texts a local verification code) add up over weeks rather than days.
Home-carrier roaming only really wins on very short trips, or in the handful of countries where a decent international day-rate add-on already exists on your plan and buying a separate SIM would just be one more thing to manage for a 48-hour stay.
We ended up running both, split by how long we were staying and how easy the local option was: an eSIM for the first day or two after landing somewhere new (or for very short stops where a physical SIM wasn't worth the errand), and a physical local SIM in countries where we were staying longer and a local shop could set us up with a better rate in five minutes. Neither approach was right for the whole trip on its own — the split is what actually worked across 20 countries with wildly different SIM-buying logistics.
Most, but not all — eSIM data plans are available in the large majority of countries now, but coverage and pricing both vary by provider, so check the specific country before you rely on one for your whole trip.
Almost always, for US carriers without a dedicated international plan. Roaming rates on a standard US plan are typically priced per megabyte or per day at a steep premium compared to what a local eSIM data plan costs for the same country.
Yes, on any dual-SIM phone — your physical SIM stays in for calls and texts on your regular number, while the eSIM handles data separately. That's the setup most eSIM users actually run.
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