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Nexiolink: country and regional eSIM plans, simple per-destination pricing.
Airalo: the widest country coverage if Nexiolink doesn't yet list your destination.
eSIM vs physical SIM vs roaming
Three ways to get data abroad — and they’re not interchangeable
Every option trades off price, setup effort, and how many phones you actually need to carry. The right one depends on your phone, your trip length, and how many countries you’re crossing.
What actually matters
eSIM: fastest setup, no physical swap
You buy a data plan, scan a QR code or tap an install link, and it activates on a separate SIM profile inside your existing phone — your home number stays active for calls/texts in a second profile. Best for trips up to a few weeks across one or several countries, as long as your phone supports eSIM.
Physical SIM: cheapest local rate, more friction
A SIM bought at the destination (airport kiosk, convenience store, carrier shop) is usually the lowest per-GB price for that specific country, but requires swapping out your existing SIM (or using a second SIM slot), finding a vendor on arrival, and sometimes ID registration depending on the country.
Roaming: zero setup, highest cost
Your home carrier's roaming charges per day or per GB are almost always the most expensive option, but require no action before or during the trip. Worth it only for very short trips (a few days) where the time saved is worth the premium.
The deciding question: how many countries, how long?
Single country, under a week: physical SIM or roaming both work. Multiple countries or longer trips: an eSIM with a regional plan avoids buying a new SIM at every border.
You can skip
Buying a physical SIM "just in case" if your phone supports eSIM and you're only visiting one or two countries for under three weeks — an eSIM plan covers that case with less hassle for a comparable price.
How eSIM actually works
No card, no tray, no swap — but check compatibility first
An eSIM is a digital SIM profile stored directly on your phone's hardware instead of a removable card. The phone itself needs to support it — this isn't a universal feature yet.
What actually matters
Check compatibility before you buy, not after
Most phones from the last 4–5 years support eSIM (iPhone XS and later, most Pixel and recent Samsung Galaxy models), but not all regional variants do — some phones sold in China, for example, ship without eSIM hardware even on otherwise-identical models. Check your specific model and region, not just the phone name.
Install it before you leave home, while you still have WiFi
Activation almost always requires an internet connection to download the profile. Doing this from your hotel WiFi after landing with a dead phone and no signal is the single most common eSIM mistake — install at home, activate the data plan only once you land.
Your existing number keeps working alongside it
Most phones support multiple SIM profiles active at once (one physical or eSIM for your home number, a second eSIM for data). Calls and texts on your home number still work as normal; the travel eSIM handles data only unless you specifically buy a plan with calling included.
Plans are data-only by default
Most travel eSIM plans don't include a phone number for calls/SMS — they're a data connection for maps, messaging apps, and mobile data. If you need a local number to receive SMS (for 2FA codes, local bookings), check the plan specifically supports that before assuming it does.
You can skip
Worrying about "losing" your home SIM — installing a travel eSIM doesn't remove or affect your existing SIM or number at all, it just adds a second profile.
Choosing a data plan
Country-specific, regional, or global — pick the narrowest one that fits
Plans are priced narrower-is-cheaper: a single-country plan costs less per GB than a regional one, which costs less than a global one. The mistake is buying broader coverage than the trip actually needs.
What actually matters
Single-country plans for single-destination trips
If the whole trip is in one country, a country-specific plan is the cheapest per-GB option every time. Don't default to a regional or global plan "for flexibility" if you know the itinerary.
Regional plans for multi-country trips in one area
A Europe-wide or Southeast Asia-wide plan covers border-hopping without buying a new plan at every crossing — worth the per-GB premium over single-country plans once you're visiting 3+ countries on one trip.
Check whether data is fixed or throttled after a cap
Some plans hard-stop at the data limit; others throttle to a much slower speed instead of cutting off entirely. For trips where you need maps/messaging working right up to the airport, a throttle-not-cutoff plan is the safer choice.
Buy slightly more than you think you'll use
Maps apps, translation apps, and messaging with photos use more data than people expect on a trip. A plan that's 20–30% larger than your estimate avoids a forced top-up mid-trip at a worse rate.
You can skip
Unlimited global plans for a single-country trip. They're priced for the broadest possible coverage and cost meaningfully more than a plan scoped to where you're actually going.
WiFi backup & common mistakes
What to do when there's no signal, and how to not need to
Even with a good data plan, expect gaps — rural areas, the underground, some hotel basements. A small amount of offline prep removes most of the stress around losing signal temporarily.
What actually matters
Download offline maps before you lose signal, not after
Google Maps and most map apps let you download an area for offline use. Do this for your destination city before you land, while you still have WiFi — it works with zero data once downloaded.
Don't rely on airport/hotel WiFi as your only connectivity plan
Public WiFi networks are frequently overloaded, password-restricted to guests/registered devices, or simply down. They're a fine backup, not a primary plan, for anything time-sensitive like a ride-share pickup or a check-in confirmation.
Set the eSIM as your active data line, not just installed
Installing a profile doesn't automatically route data through it — most phones need the new eSIM manually selected as the active line for cellular data in settings. This is the second most common setup mistake after activating before having WiFi.
Keep your home SIM's data roaming switched off
With a travel eSIM active, leaving data roaming on for your home SIM risks accidentally racking up roaming charges if the phone ever falls back to it. Turn off cellular data roaming for the home line specifically, leaving only the travel eSIM active for data.
You can skip
Carrying a dedicated portable WiFi hotspot device for solo travel. They're useful for groups sharing one connection, but for a single traveller an eSIM does the same job with one less device to charge and not lose.
eSIM device support and plan availability vary by phone model and destination — check your specific phone and country before buying.