How to use eSIM to make international calls?
Chloé Wadycki•
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Traveling today means staying connected wherever you go. While a physical SIM card can slow you down, eSIM will simplify your journey — perfect for both casual tourists and pros. This guide shows you how to use eSIM for international calls and make the most of your trips.
What you need to use eSIM for calls
To use eSIM for international calls, you’ll need:
- An eSIM-compatible device (iPhone XS or newer, most modern Android phones)
- An international eSIM plan with call and text features
- A stable mobile network or Wi-Fi connection for VoIP
- An installed eSIM profile on your phone
Ways to use eSIM for international calls
- Roam with Your Existing Carrier Using eSIM
Some mobile carriers support international roaming via eSIM. While it’s convenient, costs can add up quickly unless you’re on a travel plan. Always check your provider’s international rates before departure. - Purchase a Local eSIM in Your Destination Country or Region
Apps like Airalo or Holafly offer eSIMs tailored for specific countries or regions, often including data and voice capabilities. Ideal for short stays or regional travel. - Choose a Prepaid Global eSIM from an International Provider
Global eSIM providers offer prepaid plans that work across multiple countries. Some include voice minutes or support VoIP services, making them perfect for frequent travelers.
How does a data-only eSIM work?
A data-only eSIM gives you internet access but doesn’t come with a traditional phone number. You can’t make regular voice calls or send SMS, but VoIP services make it easy to communicate.
Making phone calls with a data-only eSIM plan
Using VoIP services for calls
Apps like WhatsApp, Telegram, Viber, and Skype let you call any phone number using only data. This is the best workaround if your eSIM doesn’t include voice.
Does your phone number change with a data-only eSIM?
No. Since you’re using apps for calling, your number stays the same within the app’s network. However, you can’t receive standard calls or SMS on your main number.
How to make calls over social media platforms with a data-only eSIM plan
Use Facebook Messenger, WhatsApp, or Instagram to make voice and video calls over the internet. These platforms use your data, not your cellular network.
Using your primary line for calls with a data-only eSIM
You can keep your physical SIM active for voice and SMS while using your eSIM for data. This allows you to receive texts and calls on your main number while benefiting from cheap international data.
Setting up and maximizing your plan
Ensure Device Compatibility
Check if your iPhone or Android supports eSIM (Settings > Cellular).
You can check your device compatibility in our detailed article on how to check if your phone supports eSIM before purchasing a plan
Purchasing a data-only eSIM
Visit trusted providers like esimseeker.com to compare plans. Look for options labeled “data-only” or “data with VoIP support.”
Installing and activating your eSIM
Follow the instructions from your provider. Usually, it involves scanning a QR code or using an app.
Learn how to set up and activate your eSIM step-by-step in our complete guide to eSIM activation – make sure your device is ready before your next trip!
Optimizing your usage and call quality
Switch off auto-updates, use Wi-Fi when available, and adjust call quality settings in your VoIP apps for smooth performance.
Using your primary phone number with a Data-Only eSIM
1. Keep your primary SIM active
Insert your SIM alongside the eSIM and set preferences in mobile settings.
2. Turn Off roaming for your Primary SIM
Avoid surprise fees by disabling roaming and using only eSIM data.
3. Confirm you don’t have a carrier travel plan
Some plans auto-activate. Check and cancel if you’re relying solely on your eSIM.
4. Set your eSIM as the data source
In mobile settings, set your eSIM as the preferred data line.
5. Be aware of carrier fees for calls and texts
You might still be charged for calls or SMS from your physical SIM.
📞 Need VoIP alternatives? Discover the best apps to make calls with a data-only eSIM in our dedicated guide: Explore VoIP solutions
Cost of calls and texts with a data-only eSIM
Call charges
VoIP apps typically offer free app-to-app calling. International calls to landlines may incur small charges.
SMS charges
Most data-only eSIMs do not support SMS. Use messaging apps instead.
How to make emergency calls with a data-only eSIM
Contacting local authorities online
Some apps or local websites allow direct chat with emergency services.
Switching to a local SIM for emergency calls
If your eSIM doesn’t support emergency calls, insert a local SIM if needed.
🌍 Want to know which providers work best in specific countries? From Europe to Asia, we’ve compared the top eSIMs to keep you covered. Find the best eSIM by destination
Will your phone number change with a data-only eSIM?
Only for standard calls and texts. For app-based communication, your account remains the same.
Setting up your eSIM
1. Ensure device compatibility
Check if your iPhone or Android supports eSIM (Settings > Cellular).
2. Purchase your eSIM plan
Use esimseeker.com to compare offers from top providers like Airalo or Holafly.
3. Install and activate your eSIM
Scan the QR code or follow your provider’s steps in their mobile app.
⚙️ Need help getting started? Learn how to activate your eSIM step-by-step with our detailed guide: How to activate your eSIM
4. Enjoy high-speed
Your phone should now show signal from the eSIM network. You’re ready to call using apps or keep your SIM active for calls.
How to check your eSIM date usage?
For iPhone users
Go to Settings > Cellular > [Your eSIM Plan] > Data Usage.
For Android users
Settings > Network & Internet > Mobile Network > Data Usage.
For micro eSIM users
Access your micro eSIM provider’s dashboard or app for real-time data tracking.
Whether you’re a travel pro or just starting out, the right eSIM card plan will keep you connected without stress. Go further with less hassle — and smarter connectivity — wherever you roam.
✈️ Ready to travel smart? Check out our top-rated eSIMs for international travel and start calling abroad without breaking the bank: Compare eSIMs now
Next step: Head to esimseeker.com to compare offers, read real user reviews, and find the perfect eSIM for your trip. Your connection abroad starts here.
