Can I just use public Wi-Fi instead?
Sometimes, but public Wi-Fi often needs registration, only works in spots, and is absent on the street or in transit — exactly when you need maps most. Most travellers use an eSIM as the base and hotel Wi-Fi for heavy downloads.
Public Wi-Fi does one job very well: staying put in one spot for a reasonable stretch, sitting in a café, a hotel lobby, or a room, with something data-heavy to do, such as downloading a large file or uploading a batch of photos. The moment you start moving, on foot, on a train, or in a taxi, spot-based public Wi-Fi is next to useless, because it is tied to a location and does not travel with you.
This page is written for anyone weighing up whether to rely purely on free Wi-Fi for a whole trip instead of buying an eSIM, anyone who has already tried that and run into trouble along the way and wants to understand why, and anyone wanting to know how to blend both for the best value. We say plainly what public Wi-Fi is good for, what it is not, and why most travellers end up combining both rather than picking just one.
Where public Wi-Fi genuinely earns its keep
Where it works well, public Wi-Fi can offer better speed and data allowance than a mobile network in plenty of cases, especially in places that have invested properly in infrastructure, such as mid-to-upper-range hotels, some airports, or co-working spaces. It suits data-heavy tasks done in a short burst while you are sitting still, such as syncing an entire photo library to the cloud before bed, or pre-downloading offline maps for the next day.
Where public Wi-Fi falls short
The first limitation is the registration step before use. Many public networks sit behind a login page — a captive portal — and some ask for a local phone number, others for a room number or an email address. That step takes time and sometimes simply fails if you lack whatever the system is asking for. The second limitation is that it only works within the radius of that particular access point — walk a few steps outside the shop and the signal is gone instantly.
The most important limitation is that it simply does not exist while you are on the street, in a car, or moving between one place and another — exactly the stretch when you most need turn-by-turn maps, a ride-hailing app, or to check a message. Plenty of travellers hit this exact problem stepping off a plane and needing to find their way to accommodation with no signal at all, because they are not yet connected to the hotel's Wi-Fi and have no mobile network of their own.
Security considerations on open networks
Many public Wi-Fi networks are open, needing no password at all, or use one password handed out to everyone in the shop. That is a different shape from a mobile network, where each connection is separated from the others by the nature of the system itself. The exact risk on any given open network depends on how that particular venue has configured it, which we have no way of knowing on your behalf. What can be said in general terms is to avoid sensitive activity, such as logging into a bank, on an unfamiliar open network, and to turn on two-factor authentication for your important accounts before you travel.
How most travellers actually blend the two
- 1Run the eSIM as the base connection for the whole tripKeep data roaming switched on for the eSIM profile the whole time, so maps, ride-hailing, and messages have signal wherever you actually go.
- 2Switch to accommodation Wi-Fi while staying stillOnce back at accommodation or settled in a place with Wi-Fi, connect to it for heavy tasks such as photo syncs or large downloads, to save the eSIM's own data allowance.
- 3Pre-download what you will need while on Wi-FiGrab offline maps, music, or anything needed during the day ahead of time while still on Wi-Fi, cutting down reliance on mobile data while out and about.
- 4Check the data allowance periodicallyOpen the app or order page to check the remaining allowance from time to time, to decide whether to lean more on Wi-Fi in the trip's final days.
Weighing tasks: which fits which
| Task | Which it fits |
|---|---|
| Turn-by-turn navigation while walking, or hailing a ride | Needs signal that travels with you — better suited to eSIM than public Wi-Fi |
| Downloading a large file or syncing an entire photo album | Best done while still on accommodation Wi-Fi, saving the eSIM's data allowance |
| Checking messages or chat through the day | Uses little data but needs continuous signal, so eSIM suits it |
| A video call in the middle of a travel day | Depends on signal strength at that exact moment — plan in advance where you will be during the call |
Common mistakes with public Wi-Fi
When you genuinely might not need an eSIM at all
There are trip shapes that genuinely can rely almost entirely on public and accommodation Wi-Fi — a trip spent mostly at one resort, a trip with a guide handling navigation the whole time so you never open your own map, or a trip where every activity is booked and planned so far in advance that nothing needs checking during the day. These trips can genuinely go Wi-Fi-only, but they are the exception rather than the general case.
Blending both for the most budget-conscious approach
For anyone trying to save money, a more sensible middle ground than picking one extreme is choosing an eSIM plan with a smaller data allowance than first assumed, then deliberately leaning on accommodation Wi-Fi for heavy tasks whenever the chance comes up. This keeps signal available for the moments it is genuinely needed, without paying for a large data allowance that would mostly be used while sitting still somewhere Wi-Fi already covers.
Checklist before deciding whether to go Wi-Fi-only
- How often does this trip involve moving between destinations?
- Will you need turn-by-turn maps or ride-hailing during the day?
- Is Wi-Fi at each accommodation confirmed, or just assumed?
- Is there anything requiring constant contact, such as work back home or urgent matters?
- If Wi-Fi registration fails mid-trip, is there a backup plan?
Still unsure which approach fits this trip
If the checklist above still leaves you unsure, look at the specific plan details for your destination first, since some countries offer smaller, more economical data plans that pair neatly with Wi-Fi. Or message us if you would like guidance tailored to the actual shape of your trip.
Portable Wi-Fi devices — an option people also mention
Some people solve this by renting or buying a portable Wi-Fi device to carry alongside or instead of an eSIM. Its advantage is that it travels with you the way an eSIM does, rather than staying tied to a location the way ordinary public Wi-Fi does. But it carries its own cost to weigh up: it is a separate device to carry and charge apart from the phone, and it relies on a data plan from whoever provides that device, which is a different service from what we offer directly, so we have no way to confirm that device's own coverage or speed.
An eSIM has the advantage of living inside the phone you already carry and charge every day, without adding a new item to your bag, without worrying about a separate device's battery dying mid-way, or leaving that device behind at the accommodation when heading out. For anyone who would rather not manage an extra device, an eSIM is usually the simpler option to keep track of, though a pocket Wi-Fi device still suits certain situations, such as a group travelling together who want to share one connection.
When Wi-Fi that is supposed to be there simply will not connect
Even in a place that genuinely has Wi-Fi available, connecting does not always go smoothly. A captive portal login page can loop without letting you through, you might select a similarly named but wrong network, or the system may need a browser opened manually rather than connecting straight from the Wi-Fi settings. Before concluding the Wi-Fi there simply does not work, try forgetting that network and reconnecting, or opening a browser deliberately so the login page appears, rather than waiting for the device to trigger it automatically.
If those fixes still do not work, this is exactly where already having the eSIM as the base connection pays off, since you are not depending on that venue's Wi-Fi working correctly in the first place. Planning for the eSIM to be the main connection, with Wi-Fi as a supplement for heavy tasks only, is safer than planning for Wi-Fi to be the sole connection for the whole trip.
A morning routine before leaving accommodation each day
Travellers who manage data smoothly usually keep a small routine before leaving accommodation each morning: check the remaining data allowance on the plan, download any maps or content needed for the day ahead of time while still on Wi-Fi, and confirm that essential apps, such as a ride-hailing app or a translation app, are updated to their latest version. This routine takes only a few minutes but considerably cuts the chance of needing a sudden burst of data mid-day.
This routine matters even more on trips that change city frequently, since each new city arrives with its own, completely different uncertainty around public Wi-Fi availability compared to the last one. What worked well in one city may not work at all in the next. Having the eSIM as a continuous signal that does not change from city to city is what does the most to smooth out that uncertainty.
Travelling as a group and public Wi-Fi
A group travelling together often runs into a specific problem: some public Wi-Fi networks limit how many devices can connect at once per account or per room, leaving some people in the group unable to connect while others connect just fine. That limit varies by venue, and we have no way of knowing any particular accommodation's or shop's specific condition in advance. Giving each person in the group their own eSIM removes this problem from the outset, since each connection is independent and nobody has to compete for a shared connection slot.
FAQ
Is public Wi-Fi safe enough for logging into a banking app?+
We cannot vouch for the security of a network we do not run ourselves. The safer route is avoiding sensitive transactions on an unfamiliar open network, and turning on two-factor authentication in advance.
The accommodation says it has free Wi-Fi — can I skip the eSIM entirely?+
It depends on how much of the trip happens outside the accommodation. If you will be out walking, hailing rides, or using maps during the day, accommodation Wi-Fi alone is usually not enough.
Public Wi-Fi registration fails because it asks for a local phone number — what can I do?+
This is a condition set by certain countries or venues themselves. If registration fails, the remaining option is to fall back on the eSIM's own signal for that stretch.
Should I buy a large data plan just in case, or a smaller one and lean on Wi-Fi?+
It depends on your actual usage habits. Try the data calculator on the site first to get an estimate, then choose a plan close to that estimate rather than guessing.
Is Wi-Fi available on trains or buses between cities?+
Some routes offer it, some do not, and signal quality varies a great deal by transport operator and route. We have no way of confirming this on behalf of any particular transport operator, so it is worth having the eSIM ready as a backup regardless.
Can I use the eSIM and public Wi-Fi at the same time?+
Yes. Most phones connect to Wi-Fi and mobile data at the same time as a matter of course, generally preferring the Wi-Fi connection automatically whenever one is active.
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