If your Vietnam eSIM is not working, showing no service or no internet, don’t worry — this is a common issue and can usually be fixed in minutes.
Below you’ll find the fastest solutions, step-by-step fixes, and what to do if your eSIM still doesn’t connect in Vietnam.
⚡ Quick Fix (Try This First)
- Turn Data Roaming ON
- Restart your phone
- Select the eSIM for mobile data
- Try manual network selection
Why Your eSIM Is Not Working in Vietnam
- Data roaming is turned OFF
- Wrong SIM selected for mobile data
- Network not selected automatically
- Temporary network issues in Vietnam
- eSIM not activated yet
How to Fix eSIM Not Working in Vietnam
1. Turn Data Roaming ON
Your eSIM requires roaming to connect to local Vietnamese networks.
2. Select eSIM for Mobile Data
Go to Settings → Mobile Data → select your eSIM.
3. Restart Your Phone
This helps your device reconnect to available networks.
4. Select Network Manually
Try switching between networks like Viettel, Vinaphone, or Mobifone.
5. Check If You Have Arrived in Vietnam
Some eSIMs activate only once you are in the destination country.
Vietnam Network Tips (Important)
- Viettel usually offers the best coverage
- Signal may be weaker in rural areas
- Manual network selection often fixes connection issues
Best eSIM for Vietnam
If your current eSIM still doesn’t work, you may need a compatible plan.
With NoveSIM, you get:
- ✔ Instant activation
- ✔ Reliable coverage in Vietnam
- ✔ No physical SIM needed
- ✔ Works on all eSIM-compatible devices
Top Vietnam eSIMs
Still Not Working?
- Delete and reinstall the eSIM
- Check device compatibility
- Contact support for a replacement QR code
If you are not sure your device supports eSIM, check our device compatibility guide.
FAQ
Why is my eSIM not working in Vietnam?
Most commonly due to data roaming being off, incorrect settings, or network selection issues.
Should data roaming be ON for eSIM?
Yes. eSIM requires roaming to connect to local networks abroad.
Which network is best in Vietnam?
Viettel is usually the most reliable, followed by Vinaphone and Mobifone.
Can I reinstall my eSIM?
Yes, but only if your provider allows it. Contact support if needed.