Using an eSIM while traveling is usually simple, but sometimes things don’t work as expected. If your eSIM is not connecting, shows no signal, or mobile data isn’t working, this guide will help you fix the most common eSIM issues on iPhone and Android.
Whether you’re traveling in Europe, Asia, the USA, or South America, these steps apply to most devices and destinations.
Common eSIM Problems Travelers Face
Here are the most frequent issues reported by travelers:
- eSIM installed but no internet connection
- No signal or “No Service” message
- Mobile data not working
- eSIM not activating after arrival
- eSIM works in one country but not another
Don’t worry, most problems can be solved in a few minutes.
1. eSIM Installed but No Internet
Possible causes
- Mobile data is disabled
- Wrong eSIM selected as primary data line
- APN not configured automatically
How to fix it (iPhone)
- Go to Settings → Cellular
- Select your eSIM under Cellular Plans
- Make sure Turn On This Line is enabled
- Set the eSIM as Cellular Data
- Enable Data Roaming
How to fix it (Android)
- Go to Settings → Network & Internet → SIMs
- Select your eSIM
- Enable Mobile Data and Data Roaming
If you’re unsure how to configure your phone, check our How to Use an eSIM on iPhone and Android (Step-by-Step Guide).
2. No Signal or “No Service”
Common reasons
- You haven’t arrived in a supported country yet
- Network selection is set incorrectly
- Temporary local network issues
Solution
- Wait a few minutes after landing
- Restart your phone
- Manually select a network:
- Settings → Cellular → Network Selection → Manual
- Try another available local network
Multi-country travelers should confirm their plan supports roaming across borders. Learn more in Which eSIM Works in Multiple Countries? (2026 Complete Guide).
3. Mobile Data Works Slowly or Stops
Slow speeds are often related to:
- Weak coverage in rural areas
- Network congestion
- Reaching your data limit
What you can do
- Move to an area with better signal
- Disable and re-enable airplane mode
- Check remaining data balance
Not sure how much data you need? Read How Much Data Do You Need When Traveling Abroad? (Complete Guide).
4. eSIM Not Activating After Arrival
Most travel eSIMs activate only when you arrive in the destination country.
Troubleshooting checklist
- Confirm you are physically in the supported country
- Enable Data Roaming
- Restart your device
- Ensure your phone is unlocked
If activation still fails, your plan may not cover that country. Always check coverage before traveling, especially for regional plans like Europe, Southeast Asia, or South America.
5. eSIM Not Showing on Your Phone
If your eSIM disappeared or never appeared:
- The QR code may have already been used
- The eSIM may have been deleted accidentally
Most eSIM QR codes can only be installed once. Avoid deleting your eSIM unless instructed.
6. Switching Between eSIM and Physical SIM
You can safely use:
- Physical SIM → calls & SMS
- eSIM → mobile data
This is especially useful to avoid roaming charges.
Learn more in eSIM vs Physical SIM: Which Is Better for Travelers in 2026? and see how to avoid roaming fees completely.
Is eSIM Safe If Something Goes Wrong?
Yes. eSIMs are secure, encrypted, and widely used worldwide. Most issues are configuration-related, not security problems.
For peace of mind, read Is eSIM Safe? What Travelers Should Know Before Using One (2026).
Best Tip to Avoid eSIM Problems
✔️ Install your eSIM before traveling
✔️ Do not activate it until arrival (unless instructed)
✔️ Save the QR code and confirmation email
✔️ Follow official installation guides
Ready to Travel Without Issues?
Choose a reliable travel eSIM and stay connected anywhere:
Stay connected. Travel stress-free. No roaming charges.