If your eSIM is not making calls, the cause is usually a data-only plan, wrong default call line, dual SIM settings, roaming restrictions, weak signal, or provider limitations — not a broken eSIM.
This is one of the most misunderstood eSIM issues. Many travelers assume every eSIM works like a traditional mobile plan with voice calls and SMS.
In reality, many travel eSIMs are designed mainly for mobile data.
You may notice:
- internet works but calls fail
- call button ends immediately
- No Service for voice only
- can receive data but cannot dial
- main SIM calls work, eSIM does not
This guide explains exactly why your eSIM is not making calls, how to fix it, and the best calling setup while traveling.
Quick answer: First check whether your eSIM includes voice calling. Many travel eSIMs are data-only. If voice is included, verify the correct calling line, roaming settings, and signal strength.
1. Your eSIM may be data-only
This is the #1 reason.
Many travel eSIM plans do not include:
- voice calls
- traditional phone number
- SMS sending
They are intended for:
- maps
- Telegram
- FaceTime Audio
- internet apps
Fix:
- Use your main SIM for regular calls
- Use VoIP apps over data
2. Wrong default calling line is selected
On dual SIM phones, calls may still route through another SIM.
If that line has no roaming or no signal, calls fail.
Fix:
- Select the correct line before dialing
- Set preferred calling line in settings
Helpful reading: Why Is My eSIM Not Working on Dual SIM?
3. Roaming is OFF
If the eSIM includes voice service, roaming may need to be enabled abroad.
Fix:
- Select the eSIM
- Turn roaming ON if your provider requires it
Helpful reading: Do You Need Roaming for eSIM?
4. Weak signal prevents voice registration
Voice calling can fail in weak coverage areas:
- airports
- basements
- mountains
- rural zones
- thick hotel buildings
Fix:
- Move outdoors
- Wait for stronger signal
5. VoLTE / network compatibility issue
Some networks require modern voice calling systems such as VoLTE.
If unsupported, calls may fail while data still works.
Fix:
- Enable LTE / VoLTE if available
- Update device software
6. Airplane mode / line disabled
Sometimes the eSIM is installed but turned OFF.
Fix:
- Check the line is enabled
- Disable Airplane Mode
- Restart phone
7. Recent update reset call settings
Phone updates may reset preferred SIM lines for calling.
Fix:
- Recheck default call line
Helpful reading: Why Is My eSIM Not Working After Phone Update?
8. International dialing format is wrong
Sometimes the network works, but the dialed number format is incorrect.
Fix:
- Use country code (+44, +1, etc.)
How to fix on iPhone
- Settings
- Cellular
- Default Voice Line
- Select desired SIM
- Ensure line is ON
How to fix on Android
- Settings
- SIM Manager
- Calls
- Select correct SIM
- Confirm signal
Best travel calling setup
- Main SIM = traditional calls / OTP
- Travel eSIM = data
- Use WhatsApp / FaceTime / Telegram calls
Fast 60-Second Fix Checklist
- Check if plan includes voice
- Select correct calling SIM
- Check signal
- Restart phone
- Roaming ON if needed
- Try internet calling app
Common traveler mistakes
Assuming all eSIMs include calls
Many do not.
Dialing from wrong SIM
Very common on dual SIM devices.
Turning off home SIM fully
You may lose your normal calling line.
Ignoring VoIP options
Data eSIMs are perfect for app calls.
When to contact support
Contact support if:
- voice is included but calls fail
- strong signal exists
- all numbers fail
- incoming works but outgoing never works
Helpful page: Contact Support
Final Thoughts
If your eSIM is not making calls, the most common reason is that many travel eSIM plans are data-only.
Use your main SIM for traditional calls, use the eSIM for data, and rely on internet calling apps for the easiest travel setup.
Need reliable travel data? Browse travel eSIM plans for your next trip.
FAQ
Can all eSIMs make calls?
No. Many travel eSIMs are data-only.
Why does internet work but calls fail?
Usually because the plan has data but no voice service.
Can I use WhatsApp calls with a data eSIM?
Yes. That is one of the best use cases.
Should I keep my main SIM for calls?
Yes, many travelers do exactly that.
Is my eSIM broken if I cannot call?
Usually no. It is often a plan limitation or settings issue.
