Travel eSIM vs roaming vs a local SIM: which is cheaper?
What roaming passes, local SIMs, travel eSIMs and pocket Wi-Fi really cost in money and hassle, with a worked 10-day example using real prices, and when a travel eSIM is the wrong choice.
· 7 min read
For most trips of a few days to a couple of months, a travel eSIM costs the least for the least hassle, as long as you don't need a local phone number. Roaming with your home carrier makes sense when your plan already includes the country, or when the trip is only a day or two. A local SIM is the right call for long stays where you need a local number. Pocket Wi-Fi suits groups sharing one connection.
The cost gap is bigger than most people expect, because roaming passes charge by the day while an eSIM charges by the GB for the whole trip. Here's how each option works, what it actually costs, and when to pick it.
Roaming with your home carrier
How it works: you land, your phone connects to a partner network, and your home carrier bills you. The charge is either per day through a pass, per MB without one, or nothing extra if your plan already includes the destination.
Good for: very short trips, and plans that already include the country at no extra cost. Some do, so check before you pay for anything else. It's also the only option that needs no setup at all.
Watch for: daily passes add up, and you pay per phone. Pay-as-you-go roaming without a pass is where the four-figure bills in the news come from.
What daily passes cost (as of September 2026)
These are the carriers' own published prices for their standard daily passes:
- Verizon TravelPass (US): $12 a day in most TravelPass countries, $6 a day in Canada and Mexico. Verizon includes 5 GB of high-speed data per session, then slows data to 3G speeds.
- AT&T International Day Pass (US): $12 a day on land, and $6 for each additional line used on the same day.
- Telstra International Day Pass (Australia): A$5 or A$10 a day depending on the destination, with 2 GB of data a day.
With passes like these, it's worth knowing exactly what starts the daily charge. Verizon's session starts when you make or answer a call, send a text or use data in a TravelPass country. So a single text sent from the taxi queue can cost a full day. UK carriers price roaming by zone and change their packages often, so check your own carrier's page for the country you're visiting.
Some US and UK plans include roaming allowances in certain countries. If yours does, that may be all you need. Just read the data allowance and the fair-use limit.
A local SIM bought on arrival
How it works: you find a phone shop or airport kiosk, show your passport, and get a prepaid SIM with a local number.
Good for: long stays, anyone who needs a local phone number, and countries where local prepaid data is very cheap.
Watch for:
- Registration. Many countries require a prepaid SIM to be registered to an identity document. Italy and Thailand, for example, both ask for a passport. In Japan, SIMs with a voice number need identity checks under Japanese law, and many aren't sold to short-stay visitors at all.
- The first hour. You need a shop that's open when you land, plus the queue, the paperwork and a language barrier at the end of a long flight.
- Your home SIM. If you swap a physical SIM, your usual number is offline for the whole trip, including bank and two-factor verification codes. You also need somewhere safe to keep the home SIM.
- eSIM-only iPhones. iPhones sold in the US since the iPhone 14 have no SIM tray. A physical local SIM won't fit, so you'd need a local carrier that sells eSIMs in store.
A travel eSIM
How it works: you buy a data plan in an app, install it before you fly, and switch your phone to it when you land. Your usual SIM stays in the phone.
Good for: most trips of a few days to a few months. You're online as the plane taxis in, nothing gets swapped, and your usual number keeps receiving calls and texts.
Watch for: it's data only, with no local phone number. If you need one, a local SIM is the better fit. Your phone also has to be unlocked; see how to check. Cabin Mode is iPhone only, and works on the iPhone XR and later.
Pocket Wi-Fi, briefly
A pocket Wi-Fi is a small rented router. You collect it at the airport or have it delivered to your hotel, carry it all day, charge it every night and post it back at the end. It makes sense for a family or group sharing one connection, or for devices that can't take an eSIM. For one or two people with modern iPhones, it's an extra thing to carry and keep charged. Also, when you and the router go different ways, whoever doesn't have it loses their connection.
A worked example: 10 days in Italy
One person, typical use of around 1 GB a day, US or Australian home plan without roaming included. Carrier prices as of September 2026. Cabin Mode prices checked 25 September 2026; the app shows current prices in your currency.
| Option | What you'd pay for 10 days |
|---|---|
| Verizon TravelPass, used every day | $120 |
| AT&T International Day Pass, used every day | $120 |
| Telstra International Day Pass at A$10 a day | A$100 |
| Cabin Mode, Italy 10 GB for 30 days | $8.56 |
| Cabin Mode, Italy 20 GB for 30 days | $16.40 |
For two people, both US passes grow further. AT&T's second line adds $6 a day, so $180 for the trip. Two travel eSIMs cost $17.12 at the 10 GB size.
The same trip to Japan works out similarly: Japan 10 GB for 30 days is $9.40. Compare that with a 10-day pass.
In fairness to the passes, they include calls and texts on your own number, and an eSIM doesn't. But calls over WhatsApp or FaceTime work fine on eSIM data. And if your usual SIM stays on without data roaming, most people can still receive texts. If you do need your home number for the odd call, you can switch on the pass for that one day and use the eSIM for data the rest of the time.
The short answer
| Roaming pass | Local SIM | Travel eSIM | Pocket Wi-Fi | |
|---|---|---|---|---|
| Online when you land | Yes | After the shop | Yes | After collecting it |
| Keeps your number active | Yes | Not with a SIM swap | Yes | Yes |
| Local phone number | No | Yes | No | No |
| Paperwork | None | Passport, often | None | Booking and return |
| Shares easily with a group | No | No | Via hotspot | Yes |
| 10-day cost, one person | Highest | Often low | Low | Rental fee |
How to decide
- Your plan already includes the country: use it, and check the data cap.
- A day or two over a border: a roaming pass is simplest.
- A week to a couple of months, no local number needed: travel eSIM.
- Several months, or you need a local number for work, housing or deliveries: local SIM. You can start on a travel eSIM for the first days while you sort it out.
- A family or group, or devices without eSIM: pocket Wi-Fi, or one larger eSIM shared by hotspot.
Compare plans by destination, or see how much data you need before you choose a size.
Frequently asked questions
Is a travel eSIM cheaper than roaming?
On trips longer than a few days it usually is. Roaming passes are charged per day, while an eSIM is priced by the GB for the whole trip. As of September 2026, Verizon and AT&T daily passes are $12 a day, and a 10 GB, 30-day eSIM for Italy costs under $9 in Cabin Mode. Check your own plan first, because some include certain countries at no extra cost.
Do I need a local SIM card to use my phone abroad?
No. A travel eSIM gives you mobile data without swapping anything, and your usual SIM keeps your number for calls and texts.
Do I need a passport to buy a SIM abroad?
Often, yes. Many countries, including Italy and Thailand, require a prepaid SIM to be registered to an identity document. A travel eSIM bought in an app before you fly doesn't involve a shop counter.
Can I get a local phone number with a travel eSIM?
Not with Cabin Mode, because its plans are data only. If you need a local number, a local SIM from a shop at your destination is the better fit.
Can I use a travel eSIM and keep roaming off on my usual SIM?
Yes, and that's the usual setup. Set mobile data to the travel eSIM, and turn data roaming off on your usual line. Your number stays reachable for calls and texts, while the eSIM carries the data.
Will I still get bank verification texts abroad?
Yes, as long as your usual SIM stays in the phone and is switched on. With a travel eSIM it does. With a local SIM swapped in, it doesn't.