Introduction
When the itinerary includes several countries, the roaming bill is usually the first unpleasant surprise. Fortunately, the combination of VoWiFi (Wi-Fi calling) and a suitable eSIM allows you to keep the conversation as if you were at home, without excessive charges and without changing the physical card.
In this guide, we break down each step necessary to make your calls free (when the operator allows it) or, at least, with local price, using the ILoveEsim eSIM and the Wi-Fi calling function of your mobile.
What is VoWiFi and why does it work with the eSIM?
VoWiFi (Voice over Wi-Fi) uses the data network to transport the voice signal. When your phone is connected to a Wi-Fi network, voice traffic is sent as data packets, in the same way that messaging applications do. The advantage is that the operator recognizes the call as if it were made through the traditional mobile network, applying the rates associated with your line's telephone number.
An eSIM acts as a virtual SIM that you can download instantly. When you purchase a ILoveEsim eSIM with a data plan, you get:
- A local IP address of the chosen country or region.
- Access to the operator's infrastructure for VoWiFi, as long as the plan includes it.
- The ability to activate multiple profiles and switch between them without removing the physical card.
Preparation before the trip
- Check the compatibility of your mobile. iOS (iPhoneXS and later) and Android 9+ devices with eSIM and VoWiFi support are the most secure.
- Update the operating system. Newer versions include security improvements and fixes for Wi-Fi calling functionality.
- Hire the appropriate eSIM. Choose a plan that includes “VoWiFi” or “unlimited calls”. In the table below you will find the most popular ILoveEsim options for 2026.
- Download the ILoveEsim app. From the official store you can scan the QR and activate the profile in a matter of minutes.
- Prepares the list of trusted Wi-Fi networks. Hotels, cafes and coworking with good bandwidth guarantee acceptable voice quality.
Step-by-step configuration
iPhone (iOS 17 or higher)
- Open Settings > Cellular > Add cellular plan and scan the ILoveEsim eSIM QR code.
- Assigns a name to the profile (for example, “Europe-Data”).
- In Settings > Cellular > Mobile data select the eSIM as Mobile data.
- Activates Settings > Telephone > Wi-Fi Calling. Make sure “Wi-Fi Only” is turned on to force the use of VoWiFi.
- Restart the device and verify that the signal bar indicates “Wi-Fi” when initiating a call.
Android (Pixel, Samsung, OnePlus, etc.)
- Go to Settings > Connections > SIM and mobile networks > Add plan and scan the QR.
- Name it and select “Use for mobile data”.
- In Settings > Calls > Wi-Fi Calling enables the option. On some devices, the setting is under “Mobile networks.”
- Check the “Prefer Wi-Fi for calls” box so that the mobile phone automatically switches when there is a signal.
- Confirm with a test: dial your own number from another phone and check that the call is established without using the cellular network.
Choosing the right eSIM: comparison table 2026
| Region | Data included | Price (USD) | VoWiFi Coverage | Validity |
|---|---|---|---|---|
| Europe | 5GB | 24 | ✔️ (unlimited) | 30 days |
| Latin America | 7GB | 28 | ✔️ (unlimited) | 30days |
| Asia-Pacific | 10GB | 32 | ✔️ (unlimited) | 30days |
| Global (multi-region) | 12GB | 45 | ✔️ (unlimited) | 60 days |
All of the above plans include unlimited Wi-Fi calling. The main difference lies in the amount of data and the coverage area.
Tips for calls without surprises
- Disable data roaming. If the mobile continues trying to use the local operator's network, you could incur data charges which, in turn, translate into voice billing.
- Use 5GHz Wi-Fi networks when possible. Lower latency and less interference, which translates into fewer “dropouts” during the conversation.
- Controls background data consumption. Some apps (automatic updates, synchronizations) can deplete your package before you finish the trip.
- Sets the eSIM priority. On iOS, go to Settings > Cellular > data priority and put the ILoveEsim eSIM first.
- Test the quality before an important call. Make a test call to your own number or a trusted contact to validate stability.
Warning: If you keep “Mobile Data” activated on the physical SIM while the eSIM is configured for VoWiFi, the phone may switch between both networks and cause unexpected billing. We recommend deactivating physical SIM data before leaving your home country.
Pro tricks to make the most of VoWiFi
- Use the “Wi-Fi Emergency Call” function. In case the mobile signal is zero, most smartphones allow you to dial emergency numbers via Wi-Fi, as long as the operator supports it.
- Combines VoWiFi with Bluetooth earbuds. Noise-canceling headphones improve voice clarity and reduce echo typical of Wi-Fi calls.
- Set “Data saving mode” only for streaming applications. This way you maintain data capacity for VoWiFi without sacrificing call quality.
- Recharge the eSIM online. If the data plan runs out before its validity expires, the ILoveEsim app allows you to purchase “top-ups” without losing the VoWiFi configuration.
Frequently Asked Questions (FAQ)
Can I receive calls over Wi-Fi without having active data?
No. VoWiFi requires a data connection, even a minimal one, to transport the signal. Without active data, the mobile will not be able to register the call.
Do Wi-Fi calling consume data on my plan?
Depends on the operator. Most ILoveEsim plans include “unlimited Wi-Fi calling,” which means that voice data consumption is not deducted from the package. However, it is always good to review the terms of the contracted plan.
What happens if I am at an airport without Wi-Fi and my local operator does not have roaming?
In this case, the call cannot be completed. The solution is to find an area with Wi-Fi (cafeteria, VIP lounge) or use a messaging app that also works via data.
Can I use VoWiFA (Voice over Wi-Fi + eSIM data) while traveling by train?
Yes, as long as the train has stable Wi-Fi coverage. On many European services, onboard Wi-Fi is sufficient for clear conversations.
Is it necessary to re-enable VoWiFi when changing countries?
No. Once the function is activated on the device, the mobile phone will keep it active as long as there is a Wi-Fi connection and the eSIM has data coverage.
Practical conclusion
Combining VoWiFi with a ILoveEsim eSIM eliminates the need to purchase local SIM cards for calls and avoids unexpected roaming bills. By following the setup steps, choosing the right plan and applying the pro tricks, you will be able to communicate as easily as at home, no matter what continent you are on.