Before a trip most people solve one question — how to get online abroad — and an eSIM closes it in minutes before departure. The second question shows up once you are travelling: a bank or a messenger sends a confirmation code, and the home SIM does not answer on roaming because it was switched off to save money. Getting online and receiving a code are different tasks, and one eSIM profile solves only the first. Here is why, and which combination of products covers both.

Two different tasks: getting online and receiving a code

The first task is data: maps, navigation, messengers, work email from a hotel. An eSIM solves it — a digital carrier profile installed on the device remotely, no visit to a local store required.

The second task is not about megabytes but about delivering one message: a sign-in code, a one-off verification for a new service, an operation confirmed in a banking app. What matters is not channel size but where the SMS actually goes. Both look like "connectivity," so travellers try to cover both with one eSIM profile — that works for the first task and almost never for the second.

Why a travel eSIM usually does not receive incoming SMS

Most travel eSIM profiles are data-only: the carrier sells a traffic package on the local network, and no voice or SMS-capable number is attached at all. There is technically nothing to receive a message on.

Even when a profile formally includes a number, it is a fresh number in an unfamiliar country, not linked to any of your accounts. A service expecting a code on the permanent number from your registration history will not send it to a random new one: to account protection that looks like a sign-in from an unfamiliar device. The takeaway: an eSIM answers "how do I get online," not "where will my code arrive."

What happens to bindings once the home SIM is off on roaming

Saving on connectivity abroad usually looks like this: the physical SIM stays in the slot, but roaming is switched off in settings, or the card is removed altogether. Either way the home network is unreachable: SMS is not delivered, and calls go straight to voicemail.

Any service whose code is tied to that number — a bank, a mailbox, a messenger — loses its delivery channel for the whole trip, not just for the expensive calls roaming was switched off to avoid. That gap is invisible in advance — it shows up exactly when the code is needed right now.

The working scheme: eSIM for data plus a virtual number for verification

A working combination splits the tasks across separate channels from the start. An eSIM covers data for the whole route regardless of the home SIM's status. A virtual number is rented separately for verification: the code does not arrive on the phone's radio module — it appears in your account over the internet, the same channel the eSIM already uses.

This scheme survives crossing several countries on one trip: the eSIM profile is swapped or topped up along the route, while the number for receiving codes stays the same throughout, since it is not tied to a SIM slot's geography. The home SIM can safely stay off — saving on roaming no longer risks account access.

Checklist before departure

  • Device support for eSIM. Not every phone accepts an eSIM profile, and some cap how many can be installed — check before packing, not in the boarding queue.
  • Activate before the trip. Some profiles need a first connection to activate — do that at home over Wi-Fi, not at the arrival terminal.
  • Traffic margin. Live navigation and video calls burn data faster than it looks: a chat is a fraction of a megabyte, a few minutes of video already eats tens of them. Buy a package with margin, not one sized exactly to the route.
  • Balance for the virtual number. Check the remaining balance in your account before departure — topping up abroad works, but settling it in advance is easier.

Frequently Asked Questions

Can the same eSIM profile be used both for data and for receiving a code?

Technically yes, if the carrier sells a voice plan with a number rather than data-only, and that number is already linked to your accounts. For a single trip it is more reliable to split the tasks: data on the eSIM, code delivery on a separate number.

What if I just leave home roaming switched on for the whole trip?

Codes keep arriving, but at an inflated rate per minute and megabyte abroad, and the connection is still less stable than at home. A dedicated virtual number is usually cheaper than full roaming.

What happens to the virtual number after coming home?

It stays active for the whole paid rental period regardless of location — keep using it or release it if it was only needed while travelling.

Set up an eSIM for internet access while travelling and rent a virtual number for verification in the eSIM section of turbon.rent; if it is unclear which product fits a task, start with the service navigator.