When you move abroad for a working holiday or a long stretch of study, the worries start the moment you land: "Will I have internet?" "Do I even need a phone number?" In practice, what you need shifts from stage to stage — the first hours after arrival, getting your life set up, and signing up for local services. This guide walks through when and where you'll actually need a phone number versus mobile data, so even a first long stay feels manageable to prepare for.
The short version
- Right after you arrive, a data-only eSIM is usually enough for maps, messaging, web searches, and app-based calls.
- Opening a local bank account, signing a mobile contract, or renting a place may require a local phone number.
- A local SIM's phone number can help with local identity checks and sign-up procedures.
- If you need to keep a number from back home, you may be able to do so through a number-parking service or a VoIP option (the rules depend on your provider).
In other words: a data eSIM for the early days, a local number for contracts, and a home-country number only for procedures that truly require it. Setting things up in stages keeps it stress-free.
A phone number and mobile data are two different things
One of the easiest things to trip over is treating "phone number" and "mobile data" as the same thing. Maps, messaging apps, web search, social media, and video calls all generally run on mobile data. A phone number — meaning voice calls and SMS (text messages) — is a separate function from data.
Because so many apps work on data alone, getting set up in your first days abroad is easy to cover with a data-only eSIM. A phone number and SMS only really become necessary for certain contracts and verification steps, which we'll cover below. Keeping that distinction in mind makes preparation much simpler.
What you need, situation by situation
Just after arrival (the airport and first few days)
Getting from the airport to your accommodation, ride-hailing apps, maps, messaging family or your school or host, looking things up where there's no Wi-Fi — almost all of it runs on mobile data. At this stage, a data-only eSIM lets you start using your phone right away, without hunting for a local shop or counter.
Setting up your life (banking, mobile, housing)
Opening a local bank account, signing up for a mobile plan, or renting a place may ask for a local phone number as your contact. This is a good moment to get a local SIM and have a local number, which can make later procedures and identity checks go more smoothly.
Procedures back home (SMS verification and the like)
Some banks, brokerages, government services, and apps in your home country send SMS verification codes (one-time passwords) to a home-country number. If you plan to use any of these while you're away, it helps to either keep that number active or switch your verification method before you go.
Quick reference table
| Situation | Mainly what you need | Notes |
|---|---|---|
| Getting around & staying in touch on arrival | Mobile data (eSIM) | Maps, ride-hailing, and app calls usually run on data |
| Local bank, mobile, and housing contracts | A local phone number | Whether it's required depends on each service |
| SMS verification & procedures back home | A home-country phone number | May be possible to keep via number parking or VoIP |
| Keeping in touch with family & friends | Mobile data (eSIM) | Mainly messaging and video-call apps like WhatsApp |
Note: whether a particular number is needed, and on what conditions, can vary by country, service, and timing. Always check the latest guidance before you begin any procedure.
Preparing in stages keeps things simple
Trying to line up everything perfectly from day one makes connectivity for a long stay feel like a burden. Thinking about it in this order means you get only what you need, when you need it.
- Before you travel: Set up a data-only eSIM so it's ready to use the moment you arrive.
- Right after arrival: Use the eSIM for maps, messaging, and looking things up as you get settled.
- Once you've settled in: Consider a local SIM (and local number) as your bank, mobile, and housing needs come up.
- If home-country procedures remain: Check whether to keep your home number active or switch your verification method.
This helps you avoid scrambling for a shop after you land, or getting stuck because you can't receive a verification code from back home.
A few honest things to keep in mind
- Bloomy eSIM is a data-only eSIM. It generally does not include a phone number, SMS, or voice calls. Apps that run on data — maps, messaging apps, video calls — work fine. If you need a phone number, SMS, or voice calls, look into a local SIM or a plan that includes a number as well.
- A number obtained through a VoIP (phone-number) app may not be able to receive or be accepted for SMS verification at banks and some services. For any number you'll use for important verification, check compatibility in advance.
- Whether you can keep your home-country number, and the conditions and costs of doing so, vary by provider. Check the latest terms for services like number parking.
- Connection quality and the specifics of each service can vary or change depending on the local network, area, congestion, your device, and the provider.
- Even with an unlimited plan, conditions such as a fair-use policy, reduced speeds after a certain amount of use, or limits on tethering may apply. Check the terms at the time of purchase.
What you can do with Bloomy eSIM
With Bloomy eSIM, you can compare data allowance, number of days, and unlimited versus standard plans for the country or region you're heading to. It's a clear way to line up the mobile data you'll use to get settled — even if it's your first time abroad. It works well for the "sort out the internet first" approach, on the assumption that contracts needing a phone number or SMS are handled locally, and home-country procedures with a home number.
Related links
- Can you use a phone number with eSIM alone? Calls, SMS, and verification explained
- When do you need a local carrier's phone number?
- Pre-departure checklist: preparing mobile data (eSIM) and a phone number
- eSIM comparison page
Wrapping up
For a working holiday or long-term study abroad, setting things up in stages works best: a data-only eSIM for your first days, a local number for contracts like banking and mobile, and a home-country number for procedures back home. Start with mobile data you can use as soon as you land, then add a local SIM or a number-enabled option as the need arises. If you'd like a closer look at the difference between a phone number and mobile data, see Can you use a phone number with eSIM alone? Calls, SMS, and verification explained. And if you want to find a plan for your destination, head to the eSIM comparison page to choose by country, data allowance, and number of days.
