Moving to another country has an awkward moment: you land, you don't have a local line, and you need internet for a taxi, the bank, your apartment, and to let people know you've arrived. An eSIM gives you connectivity from minute one as a bridge until you get your local number, with no contract, no deposit, and no need to visit a physical store. Here's how to set it up correctly and what to do at each stage of your expatriation.
Why an eSIM is the best bridge when expatriating
Direct answer: an eSIM connects you as soon as you land without any paperwork, whereas getting a local line often requires a local bank account, registration, or tax number—things you won't have immediately upon arrival. The eSIM covers that gap of days or weeks with stable internet and support in Spanish.
When you expatriate, there's a curious legal-administrative void: to open a bank account, you often need a local phone number, but to get that number, you need a bank account. The eSIM breaks that cycle. You install the plan before leaving home, land with data, and handle all urgent matters without relying on hotel Wi-Fi or rushing to buy a SIM at the airport in a language you may not yet master. If your move is within Europe, a Europe eSIM for 30 days will cover your first month of settling in perfectly.
Before you fly: prepare your connection
The key to a smooth expatriation is arriving already connected. Install the eSIM at home, using your Wi-Fi, and have it ready to activate upon landing. This way, you don't depend on anything external on the first day, which is usually the most chaotic.
Pre-flight checklist:
- Check if your phone is compatible with eSIM (most mid-to-high-end phones since 2019 are).
- Install the plan for your destination country in advance and leave it inactive until you arrive.
- Download offline maps, a translator, and your relocation documents.
- Save screenshots of reservations, apartment address, and key contacts in case your battery dies.
Installation is quick: our guide on how to activate an eSIM provides step-by-step instructions. The advantage of doing it at home is that you can activate data with a single tap as soon as you land, without searching for a QR code or Wi-Fi in an unfamiliar airport.
The first 48 hours: essential procedures that require internet
The first two days are a marathon of tasks, and almost all of them require connectivity. Having your own data saves you stress and makes you appear (and feel) less like a lost tourist.
What you'll need internet for immediately upon arrival:
- Transportation: ordering a taxi or ride-sharing service, buying a metro pass, looking up routes.
- Accommodation: communicating with the landlord or reservation app, opening smart locks.
- Bank: many neobanks (Revolut, N26, Wise) can be opened from your mobile and provide an IBAN to get you started.
- Paperwork: requesting an appointment for residence registration, tax number, or national social security.
Expat tip: open an account with a digital bank before moving. It gives you an IBAN and a card without visiting a physical office, and many local services will accept this while you process your "main" account.
For remote work during these first few weeks, a stable eSIM is invaluable; if you plan to telework while settling in, check out our guide on eSIM for remote work.
From eSIM to local line: when to make the switch
The eSIM is a bridge, not a permanent destination for those staying to live. Once you have a bank account and local address, subscribe to a local plan: it will be cheaper in the long run and you'll have a local number for banks, delivery services, and official services.
The ideal time to make the switch is usually between the second and fourth week, once you have:
- A local bank account or neobank with a country-specific IBAN.
- A residential address (rental contract or registration).
- An identity document or residence permit in process.
In the meantime, the eSIM keeps you operational. And here's a smart move: many phones allow you to carry two SIMs at once, so you can have the new local line and keep the eSIM (or your Spanish number) in parallel without changing phones or swapping trays.
Keep your Spanish number active
When expatriating, you won't want to lose your Spanish number: your Spanish bank, tax authorities (Hacienda), family, and dozens of services use it for SMS verification. The elegant solution is dual SIM: your Spanish number to receive those SMS and calls, and the eSIM (or later, the local line) for data.
With this setup, you receive your Spanish bank's code while browsing with data from the new country, all on the same phone. You can leave your Spanish SIM just for calls and SMS (without data, to avoid roaming charges) and use the eSIM for internet. If you're concerned about retaining your digital identity, this guide on keeping your Spanish number with an eSIM explains your options. The key: deactivate data for your Spanish SIM so that expensive roaming doesn't accidentally kick in, something you can control as we see in how to avoid roaming.
Typical newcomer mistakes
Many expatriates make the same mistakes in their first few weeks. Avoiding them saves you money and headaches.
- Leaving your Spanish SIM's roaming on: it can cost you €10-€20 a day without you realizing it. Deactivate it before you fly.
- Waiting to buy a SIM at the airport: queues, inflated prices, and sometimes they require documentation you don't yet have.
- Signing up for a local line immediately: some operators tie you to a contract; start with prepaid or an eSIM until you know the market.
- Not verifying phone compatibility: check beforehand that your phone accepts eSIMs and is unlocked.
The sensible strategy is to stagger: an eSIM for the first month, a prepaid local line when you have an account, and a contract with a commitment only when you know you're staying and which plan is best. This way, you're never without internet and you don't commit blindly.
Comparison: eSIM vs. local SIM vs. roaming
To decide how to connect at each stage of your move, this table summarizes the three options based on what matters to a newly expatriated person:
| Criterion | Travel eSIM | Local SIM | Spanish Roaming |
|---|---|---|---|
| Ready upon landing | Yes, instantly | No, needs to be purchased | Yes, but expensive |
| Requires paperwork | No | Sometimes (ID, address) | No |
| Local number | No (data only) | Yes | No |
| Cost in first weeks | Low-medium | Medium | High |
| Ideal for | Initial bridge | Long stay | Never as a plan |
The conclusion is clear: the eSIM wins in the initial phase due to its speed and zero paperwork; the local SIM wins in the long term for the number and price; and roaming is just an expensive patch that should be avoided. Many use all three in sequence throughout their first month.
Frequently Asked Questions
Can I use a travel eSIM for living abroad?
As a bridge, yes: it gives you internet from day one without paperwork. For a long stay, it's advisable to switch to a local line as soon as you have a bank account and address, because it will give you a local number and a better monthly price. The eSIM perfectly covers those first few weeks.
Do I need to keep my Spanish number when I expatriate?
Highly recommended. Your Spanish bank, tax authorities (Hacienda), and many services send codes via SMS to that number. With dual SIM, you can keep it active (only for calls and SMS, without data) while browsing with the new country's eSIM on the same phone.
When should I switch to a local SIM?
When you have a local bank account or neobank with a country-specific IBAN and a residential address, typically between the second and fourth week. Until then, the eSIM keeps you connected without relying on procedures you can't yet complete.
What about roaming on my Spanish card?
Outside the EU, leaving it active can cost you between €10 and €20 a day. Deactivate data for your Spanish SIM before flying and use the eSIM for internet. Leave the Spanish SIM only for receiving important SMS and calls.
Can I have both an eSIM and a local SIM at the same time?
Yes, most modern phones are dual SIM: they can combine a physical SIM with one or more eSIMs. This way, you keep your local line for calls and the eSIM or your Spanish number as convenient, without changing phones or trays.
Conclusion
Expatriating is already enough of a hassle without arriving without internet. An eSIM gives you immediate connection for taxis, banking, your apartment, and paperwork from minute one, and then you switch to a local line once you have an account and address. Start your new life connected from the moment you land with an eSIM ready before you fly, and leave the stress of connectivity out of your move.
