How to Call Without Roaming Charges While Traveling
Aug
Calling, texting, checking bookings, or receiving verification codes abroad can become expensive if your home SIM starts using international roaming.
The good news is that you can often call without roaming by combining a travel eSIM with internet-based calling apps. The right setup depends on whether you only need WhatsApp or FaceTime, want to keep your home number active, or need normal cellular calls and SMS.
The Simplest Option: Use an eSIM for Data Calls
If you mainly communicate through WhatsApp, FaceTime, Messenger, Telegram, LINE, or similar apps, you usually do not need traditional voice roaming.
These services use mobile data or Wi-Fi, so a travel eSIM can provide the internet connection while your home SIM avoids expensive data roaming.
For example, after landing in Japan, you could use a Twise eSIM to message your hotel, call family through WhatsApp, open Google Maps, and check transport apps without using your primary SIM for mobile data.
Twise offers local and multi-country travel eSIM plans with digital QR-code delivery, making it possible to prepare your connection before or during your trip.
Keep Your Home SIM for Your Number
Travelers do not always need to remove their normal SIM.
On compatible Dual-SIM phones, you can keep your primary line active while using the travel eSIM for cellular data.
A practical setup is:
Home SIM: Keep the line active, but turn Data Roaming OFF.
Travel eSIM: Select it for Cellular Data and enable roaming if the travel eSIM requires it.
This can help you keep access to your regular phone number while using another network for internet access.
However, keeping your home SIM active does not guarantee that calls or SMS are free. Your carrier may still charge for roaming services, so check its policy before departure.
What About Verification Codes?
This is important if you use banking, payment, or work accounts.
A data-only eSIM normally does not provide a traditional mobile number, so it cannot replace your home SIM for SMS verification codes.
If a bank sends a code to your usual number, your original SIM must still be able to receive it.
Before traveling, consider setting up authentication apps or backup login methods where available. This can reduce your dependence on international SMS.
Wi-Fi Calling Can Also Help
Some mobile carriers support Wi-Fi Calling, allowing you to use your normal number through a Wi-Fi connection instead of a local cellular signal.
This can be useful in hotels, airports, and other places with reliable Wi-Fi.
However, Wi-Fi Calling is not automatically free for every international call. Your carrier still controls how calls are billed, so check the rules before relying on it abroad.
When Do You Need a Voice-and-SMS eSIM?
A data-only eSIM is enough for many travelers, but not everyone.
You may need a plan with a real phone number if you expect to call local restaurants, airlines, hotels, businesses, or people who do not use internet messaging apps.
Some local eSIM plans include voice calls and SMS, while many international travel eSIMs are data-only.
Always check whether a plan includes a phone number, voice minutes, and SMS before purchasing.
Best Ways to Call Without Roaming
| Option | Internet calls | Normal calls/SMS | Keep home number | Best for |
| Home roaming | Yes | Yes | Yes | Maximum convenience |
| Twise travel eSIM | Yes | Usually no on data-only plans | Yes with Dual SIM | WhatsApp, FaceTime, maps and travel apps |
| Other travel eSIMs | Yes | Depends on plan | Usually | Comparing destination plans |
| Local voice eSIM | Yes | Yes when included | Often | Local calls and SMS |
| Wi-Fi | Yes | Usually no | Separate | Occasional calling |
For most tourists, a travel eSIM plus WhatsApp, FaceTime, or another internet calling app is the simplest combination.
Quick Setup Before You Travel
Install your travel eSIM while you have a reliable internet connection and clearly label your two lines, such as Home and Travel.
Choose the travel eSIM for mobile data and disable Data Roaming on your primary SIM. You may also want to turn off automatic cellular data switching so the phone does not unexpectedly use your home carrier.
Finally, test the apps you plan to use before departure.
Call Without Roaming and Keep Your Travel Data Under Control
If expensive roaming is the main concern, using a travel eSIM for mobile data can make calling and messaging abroad much easier.
Use your eSIM for WhatsApp, FaceTime, maps, transport apps, and other online services while keeping your home SIM protected from unnecessary data roaming.
Want to call without roaming while traveling across several destinations? Explore the Twise eSIM for multi-country mobile data that keeps your essential communication apps connected without depending on home-carrier data roaming.
FAQs
More Helpful Tips for Your Journey
- USA eSIMs with Phone Number: Unlimited Calls & Texts Included
- Europe eSIM with phone number | Instant Setup, No Hidden Fees
- Thailand eSIM with Phone Number: Calls, SMS, Data & Tourist App Setup
- How Much Does a Travel Hotspot Cost? Pocket Wi-Fi vs Phone Hotspot vs eSIM
