You need to approve a transfer, but the bank verification text never arrives. You can usually avoid this by keeping your home SIM active while a travel eSIM handles mobile data. The right settings and a home plan that supports roaming at your destination are essential.
A travel eSIM does not automatically replace the phone number registered with your bank. Many travel plans provide data only. They let you use online banking while traveling but cannot receive TAN texts.
Key takeaways
- The mobile number registered with your bank must remain reachable at your destination.
- A data-only eSIM cannot receive verification texts, but it can provide internet access for online banking.
- You can turn off data roaming for your home SIM without disabling incoming texts.
- Check your carrier's roaming options and prices before you travel, including for incoming texts.
- Test your authentication method, registered phone number, and Dual SIM setup before departure.
How two SIMs split the work
On a Dual SIM smartphone, your home SIM and travel eSIM can remain active at the same time. Your home line receives the bank verification text. The travel eSIM connects your banking app, browser, and authentication app to the internet.
This Dual SIM setup with eSIM lets you keep your regular number while managing mobile data separately. Your physical home SIM can stay in the phone. If your home line already uses an eSIM, your phone must support using a second eSIM at the same time.
The roles can be split like this:
| Function | Home SIM | Travel eSIM |
|---|---|---|
| Receive bank verification texts | Yes, if roaming is available | No on data-only plans |
| Mobile data | Off | On |
| Calls on your regular number | Possible, charges may apply | Only if the plan includes calls |
| Use the banking app | Not used as the data line | Provides the internet connection |
Whether you can make calls or send texts with your eSIMony eSIM depends on the selected plan. A data-only eSIM does not have a conventional phone number for bank verification texts. The number registered with your bank therefore remains linked to your home SIM.
[cta title="Two SIMs, Clear Roles for Banking" description="Use the travel eSIM for your banking app and browser while your home SIM receives verification texts." button_text="View eSIMs" button_url="https://www.esimony.com/products/esim-europe"]
What does a bank verification text need abroad?
A bank verification text needs a cellular signal, but it does not need mobile data. Your home SIM must be switched on and connected to a supported roaming network. Data roaming can remain off for that line.
With SMS authentication, sometimes called an SMS TAN or mTAN, the bank sends a one-time code to the registered mobile number. The code approves a specific login, transfer, or card transaction. It is normally valid for only a short time.
Four conditions must be met to receive the code abroad:
- The phone number registered with your bank is current.
- Your home SIM is active in the phone.
- Your carrier supports roaming at your destination.
- The phone is connected to a regular cellular network.
Wi-Fi or the travel eSIM's data connection cannot replace cellular reception for your home line. It can, however, provide internet access to the banking app at the same time. For reliable SMS reception, leave network selection on automatic at first.
If you want to use your current phone number with an eSIM, the type of eSIM matters. A travel eSIM does not transfer your regular number to the travel plan. That number remains assigned to your existing mobile profile.
How do you set up both lines?
Install the travel eSIM before departure if possible, using the provided QR-Code. Then select it as your mobile data line and turn off automatic data switching. The start of the plan's validity period depends on its activation terms.
Settings on iPhone
Labels may vary slightly by iOS version. You will usually find both lines under Settings and Cellular. Give them clear names, such as Home and Travel.
- Add the travel eSIM using the QR-Code.
- Leave your home SIM switched on as a cellular line.
- Select the travel eSIM under Cellular Data.
- Turn off data roaming for your home SIM.
- Turn off Allow Cellular Data Switching.
- Enable data roaming for the travel eSIM only if the plan instructions require it.
You can choose the default line for voice calls separately. Incoming texts will still reach your regular number as long as that line has cellular service.
Settings on Android
Android menu names vary by manufacturer and version. The settings are often under Connections, Network & Internet, or SIM Manager. Give each line a clear name there as well.
- Add the travel eSIM in SIM Manager.
- Enable your home SIM for calls and texts.
- Set the travel eSIM as the preferred SIM for mobile data.
- Turn off data roaming for your home SIM.
- Disable automatic switching between data lines.
- Check the plan instructions to see whether the travel eSIM requires data roaming.
Some phones can store multiple eSIM profiles but activate only one eSIM at a time. Before buying, check whether your phone supports your preferred combination of a physical SIM and an eSIM or 2 active eSIMs.
When is receiving a verification text free?
Check whether your mobile plan includes roaming and what charges may apply to incoming texts in the countries you visit. For destinations such as the 27 EU countries, Iceland, Liechtenstein, and Norway, rules may differ by plan and destination.
These regional rules cover calls, texts, and mobile data when an eligible plan roams in participating countries. Special business plans and contracts that exclude international roaming may differ, so check your carrier's terms before traveling.
If your plan is covered, you can usually leave your home SIM active for bank verification texts while visiting Spain, Italy, or Greece. Whether you also need a travel eSIM depends on the mobile data included with your home plan.
Outside your plan's included roaming area
Whether you can receive texts in Switzerland, Turkey, the United Kingdom, or other destinations, and what charges may apply, depends on your home plan. Check incoming texts, calls, voicemail, and mobile data separately.
Your home SIM can remain active for bank texts while a travel eSIM handles data. The same setup works in the United States or any other destination where your carrier supports roaming and incoming texts.
Simply leaving your home line switched on does not use mobile data if data roaming and automatic data switching are off. Calls, outgoing texts, and voicemail access may still incur charges. Depending on your carrier and destination, even answering a call may cost extra.
Be careful on ships and aircraft
Onboard cellular networks sometimes use satellite connections. Standard land-based roaming arrangements may not apply, even when a ship travels between countries covered by the same regional roaming rules. Charges can differ significantly from those on regular cellular networks.
At sea, airplane mode is the safest way to prevent your phone from connecting automatically. You cannot receive a bank verification text while airplane mode is on. Wait until the phone reconnects to a regular cellular network on land before completing the transaction.
What should you do if the verification text does not arrive?
First, check that your home SIM is switched on and displays a network name. Then restart the network search. Do not request several codes immediately because the bank may invalidate older codes when you request a new one.
Work through these steps in order:
- Turn airplane mode on for a few seconds, then turn it off.
- Open the SIM menu and confirm that your home line is active.
- Check that the travel eSIM is still selected as the data line.
- Let the phone search automatically for a roaming network.
- Restart the phone, then request a new code.
- Check that your bank has the correct mobile number.
- Contact your carrier if the SIM cannot connect to any network.
A delayed text can result from the connection between the bank, your home carrier, and a roaming partner. If the code expires before delivery, you will need a new one. A data-only eSIM cannot bypass this delivery problem.
Before traveling, test SMS reception by sending a regular message to your home number. This does not confirm that your carrier has a roaming partner at your destination, so check the plan terms as well.
What are the alternatives to SMS authentication?
Push approval, app-based authentication, and some photo-based methods confirm payments through an app and need internet access rather than SMS reception. A physical security token can work without a cellular connection. Your bank determines which methods are available.
App-based approval
With push or app-based authentication, you receive the approval request in a separate authentication app or directly in the banking app. Online banking over the travel eSIM can then work without a reachable home number. You still need a device that has already been registered and approved by the bank.
Do not wait until you reach the airport to set up a new authentication method. Some banks mail activation codes or require confirmation through your existing method. After changing phones, also check that your banking and authentication apps remain activated.
Photo-based authentication and security tokens
With photo-based authentication, an app or separate reader verifies the transaction details. A physical security token generates the approval code using a bank card or an image displayed on the banking screen. Carrying a separate device is less convenient, but it works independently of cellular reception and mobile data.
SMS-based methods have security weaknesses, including risks related to intercepted messages and unauthorized SIM transfers. App-based approval and physical security tokens may offer a stronger alternative when your bank supports them.
How can you keep online banking secure while traveling?
Use your travel eSIM's mobile data connection or a trusted private Wi-Fi network for banking. Public networks at airports, hotels, and cafes may be fake or poorly secured. Open your bank only through its official app or a web address you have saved yourself.
Fake bank texts often create urgency by claiming that your account is locked or that a suspicious payment occurred. Do not open links in these messages. A legitimate verification code is tied to a specific transaction, not a general request to confirm your account.
These precautions reduce the risks of banking while traveling:
- Update your operating system, banking app, and authentication app before departure.
- Protect the phone with a long device PIN and biometric lock.
- Check the amount, recipient, and account details before approving anything.
- Save your bank's and carrier's emergency contact numbers offline.
- Hide message previews on the lock screen.
- Enable device location and remote erasing.
If your phone is lost, ask your carrier and bank to block the home SIM, online banking access, and authentication method immediately. Then change your login details using a trusted device. Depending on the provider, you may also be able to disable the travel eSIM or remove it from the lost phone.
Your authentication method matters before you travel
If your bank relies only on SMS authentication, you need a reachable home SIM and supported roaming while traveling. If you already use an activated authentication app, the travel eSIM's internet connection is often enough to approve transactions. A physical security token makes you fully independent of cellular reception.
The right setup depends less on your destination than on your bank's authentication method and your phone's capabilities. Confirm both while you still have access to your home network, account documents, and any mailed activation codes.
[cta title="Mobile Data for Banking While You Travel" description="The eSIM handles internet access while your home number stays active for bank verification texts." button_text="View Plans" button_url="https://www.esimony.com/products/esim-europe"]
Frequently asked questions
Can I receive a bank verification text in airplane mode?
No. Airplane mode disables the cellular connection. Wi-Fi works only for internet-based authentication methods, not for a text sent to your regular mobile number.
Can I use a physical SIM with a travel eSIM?
Yes, if your phone supports that Dual SIM combination. The physical SIM can receive texts while the eSIM provides mobile data.
Can I use my banking and authentication apps on the same phone?
That depends on your bank's security requirements. Many banks allow both apps on one device, while others recommend or require separate devices. Check the requirements before departure.
What happens if a verification code arrives late?
A code that has expired or been replaced by a newer request will no longer work. Check the transaction details again before requesting a new code.
Can a travel eSIM use my regular phone number?
No. A travel eSIM is a separate mobile profile. Your regular number remains assigned to the SIM or eSIM associated with your home plan.
