If your Taiwan eSIM shows signal but has no internet, the problem is usually caused by an incorrect mobile data line, disabled Data Roaming, a missing APN or an incomplete network connection. The eSIM may already be installed and registered while the phone is still unable to route mobile data correctly.
Start by turning off WiFi and checking whether the Taiwan eSIM is selected as the active mobile data line. Enable Data Roaming on the travel profile, disable automatic data switching and confirm that the APN is data.esim when manual configuration is available.
Do not delete the eSIM while testing the connection. Many travel eSIM installation codes are valid for one download only, and removing the profile may make reinstallation impossible with the same QR code.
Quick answer: Select the Taiwan eSIM for mobile data, enable Data Roaming, disable mobile data switching, set the APN to data.esim, keep network selection on Automatic and refresh the connection with Airplane Mode for 30 seconds.
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Why Does the Taiwan eSIM Have No Internet?
A no-internet problem can occur even when the phone displays signal bars, LTE, 4G or 5G. Network registration and working mobile data are separate parts of the connection.
The most common causes are:
- The home SIM is still selected for mobile data.
- Data Roaming is disabled on the travel eSIM.
- Automatic mobile data switching is enabled.
- The APN is missing or incorrect.
- The eSIM line is installed but turned off.
- The plan does not include Taiwan.
- The data allowance or validity has ended.
- The phone is connected to an unsupported network.
- The device has not completed its first registration after arrival.
Fast No-Internet Checklist
| Check | Correct Setting |
|---|---|
| Taiwan eSIM | Installed and enabled |
| Mobile data line | Taiwan eSIM selected |
| Data Roaming | Enabled on travel eSIM |
| Home SIM roaming | Disabled |
| Automatic data switching | Disabled |
| Network selection | Automatic |
| APN | data.esim |
| WiFi during testing | Turned off |
1. Turn Off WiFi Before Testing
WiFi can hide whether the eSIM connection is working. Your phone may load websites through airport, hotel or café WiFi while the mobile data setup remains incorrect.
To test properly:
- Turn WiFi off.
- Confirm mobile data is enabled.
- Open a new webpage.
- Try a map or messaging application.
- Check whether 4G, LTE or 5G appears.
If nothing loads after WiFi is disabled, continue through the remaining checks.
2. Confirm the Taiwan eSIM Is Turned On
An eSIM can remain installed while the line itself is disabled.
On iPhone
- Open Settings.
- Select Cellular or Mobile Service.
- Tap the Taiwan or NoveSIM line.
- Enable Turn On This Line.
On Samsung
- Open Settings.
- Select Connections.
- Open SIM Manager.
- Turn on the Taiwan eSIM.
On Google Pixel
- Open Settings.
- Select Network & Internet.
- Open SIMs.
- Select the travel eSIM.
- Enable Use SIM.
3. Select the Taiwan eSIM for Mobile Data
The phone may continue using your primary SIM even after the travel profile is enabled.
On iPhone
Settings → Cellular → Cellular Data → Taiwan eSIM
On Samsung
Settings → Connections → SIM Manager → Mobile Data → Taiwan eSIM
On Google Pixel
Settings → Network & Internet → SIMs → Mobile Data → Taiwan eSIM
After selecting the travel line, wait briefly and test again with WiFi off.
4. Enable Data Roaming on the Travel eSIM
Travel eSIMs normally connect through partner networks. For this reason, Data Roaming must usually be enabled on the travel profile.
The correct setup is:
| SIM Line | Mobile Data | Data Roaming |
|---|---|---|
| Taiwan eSIM | Selected | Enabled |
| Home SIM | Not selected | Disabled |
Enable roaming on iPhone
Settings → Cellular → Taiwan eSIM → Data Roaming
Enable roaming on Samsung
Settings → Connections → Mobile Networks → Data Roaming
Enable roaming on Google Pixel
Settings → Network & Internet → SIMs → Taiwan eSIM → Roaming
5. Disable Automatic Mobile Data Switching
Automatic switching can move the connection back to your regular SIM when the phone detects a temporary signal change.
This can cause:
- No internet when roaming is disabled on the home SIM.
- Unexpected roaming charges.
- Unstable switching between two mobile networks.
- Applications that connect and disconnect repeatedly.
On iPhone
Open Cellular Data and disable Allow Cellular Data Switching.
On Android
Look for options such as:
- Automatic Data Switching.
- Switch Mobile Data Automatically.
- Backup Mobile Data.
- Data During Calls.
The exact name depends on the phone manufacturer and software version.
6. Check the APN
If the phone shows signal but has no internet, the APN is one of the most important settings to verify.
For a NoveSIM Taiwan eSIM, use:
| APN Field | Value |
|---|---|
| Name | NoveSIM or Taiwan |
| APN | data.esim |
| Username | Leave empty |
| Password | Leave empty |
Enter data.esim exactly, without spaces.
APN on iPhone
Settings → Cellular → Taiwan eSIM → Cellular Data Network
The menu may not appear if the profile configures the APN automatically.
APN on Samsung
Settings → Connections → Mobile Networks → Access Point Names
Create the APN, save it and select it from the list.
APN on Google Pixel
Settings → Network & Internet → SIMs → Taiwan eSIM → Access Point Names
7. Save and Select the APN on Android
On Android, entering the APN values is not always enough. The new access point must also be saved and selected.
- Enter the required values.
- Open the three-dot menu.
- Select Save.
- Return to the APN list.
- Tap the newly created profile.
- Confirm that it is marked as active.
If another APN remains selected, the phone may continue using the wrong configuration.
8. Turn Airplane Mode On for 30 Seconds
Airplane Mode forces the device to disconnect and complete a new network registration.
- Turn Airplane Mode on.
- Wait 30 seconds.
- Turn Airplane Mode off.
- Wait several minutes.
- Test mobile data with WiFi disabled.
This is especially useful after changing the APN, roaming or active data line.
9. Restart the Phone
A restart can apply newly saved settings and clear a temporary registration problem.
After restarting, check again that:
- The travel eSIM is enabled.
- It is selected for mobile data.
- Data Roaming is still enabled.
- The APN remains correct.
- Automatic switching remains disabled.
10. Keep Network Selection on Automatic
Automatic network selection allows the eSIM to connect to an available supported partner network.
Manual selection can prevent internet access if the chosen operator is visible but not included in the eSIM plan.
Use manual selection only when:
- Automatic registration repeatedly fails.
- Customer support provides a specific network.
- You have already completed the standard settings checks.
Signal but No Internet
Signal bars indicate that the phone has detected or registered on a mobile network. They do not confirm that mobile data is configured correctly.
When you have signal but no internet, check:
- The Taiwan eSIM is selected for mobile data.
- Data Roaming is enabled.
- The APN is data.esim.
- The Android APN is saved and selected.
- The plan has remaining data.
- The plan has not expired.
- WiFi is disabled during testing.
LTE or 5G Appears but Nothing Loads
A network indicator can appear before the internet session is fully established.
Try these steps:
- Open a different website.
- Close and reopen the browser.
- Turn Airplane Mode on for 30 seconds.
- Restart the phone.
- Check the APN.
- Move outdoors and test again.
A captive WiFi login page can also interfere with testing, so make sure WiFi is completely off.
No Internet Immediately After Landing
The first network connection can take several minutes after arrival.
After landing:
- Turn on the Taiwan eSIM.
- Select it for mobile data.
- Enable Data Roaming.
- Keep Network Selection on Automatic.
- Wait several minutes.
- Move away from underground arrival areas.
- Toggle Airplane Mode if necessary.
Airport basements and enclosed arrival halls may have weaker reception than areas outside the terminal.
No Internet After the eSIM Worked Earlier
If the eSIM previously worked, check whether:
- The data allowance has been fully used.
- The validity period has ended.
- The phone switched to the home SIM.
- The APN changed after a software update.
- You entered a weak-signal area.
- The daily high-speed allowance was reached.
A slow connection and no connection are not always the same issue. Test lightweight services such as messaging and a basic webpage.
Check Whether the Plan Includes Taiwan
An installed eSIM does not automatically work in every country.
Your plan must be:
- A Taiwan single-country eSIM.
- An Asia regional plan that includes Taiwan.
- A global plan that explicitly includes Taiwan.
A plan purchased only for another destination will not normally connect in Taiwan.
Check Plan Validity and Remaining Data
The profile can remain visible after the plan has expired or used all available data.
Review:
- The activation date.
- The validity period.
- The remaining data allowance.
- The order confirmation.
- The eSIM details in your account.
Your phone’s internal data counter can provide an estimate, but it may not match the plan’s exact billing period.
Fixed-Data Plan With No Internet
When a fixed-data allowance is fully used, mobile internet may stop completely.
High consumption can come from:
- Cloud photo backups.
- Video streaming.
- Video calls.
- Automatic application updates.
- Personal Hotspot.
- Large file uploads.
If the allowance is exhausted, purchase and install a new plan.
Unlimited-Style Plan With No Usable Internet
NoveSIM unlimited-style plans include 1GB of high-speed data during each 24-hour period. After the daily allowance is used, speed may be reduced until the next reset.
The connection may feel unavailable when trying to use high-bandwidth services such as:
- High-resolution video.
- Large downloads.
- Video conferencing.
- Cloud backup.
- Hotspot for a laptop.
Try a lightweight webpage or messaging application. If those work, the connection may be reduced rather than completely disconnected.
No Internet on iPhone
Use this iPhone checklist:
| iPhone Setting | Required Status |
|---|---|
| Turn On This Line | Enabled |
| Cellular Data | Taiwan eSIM |
| Data Roaming | Enabled |
| Cellular Data Switching | Disabled |
| Network Selection | Automatic |
| APN | data.esim when editable |
If the APN menu is missing, do not delete the eSIM. The profile may manage the setting automatically.
No Internet on Samsung
Use this Samsung checklist:
| Samsung Setting | Required Status |
|---|---|
| eSIM in SIM Manager | Enabled |
| Preferred Mobile Data SIM | Taiwan eSIM |
| Data Roaming | Enabled |
| Automatic Data Switching | Disabled |
| Access Point Name | data.esim |
| APN selected | Yes |
No Internet on Google Pixel
Use this Pixel checklist:
| Pixel Setting | Required Status |
|---|---|
| Use SIM | Enabled |
| Mobile Data | Enabled |
| Preferred Data SIM | Taiwan eSIM |
| Roaming | Enabled |
| Automatic Data Switching | Disabled |
| APN | data.esim |
No Internet in Tunnels or Remote Areas
Temporary loss of internet can occur in:
- Railway tunnels.
- Underground metro stations.
- Mountain regions.
- Remote coastal routes.
- Underground parking areas.
- Buildings with thick walls.
Move outdoors or toward a populated area and test again before changing settings.
VPN Connected but No Internet
A VPN can sometimes block or delay traffic while the mobile connection itself is working.
Temporarily disable the VPN and test again. If internet returns, select another VPN server or adjust the application settings.
Hotspot Works Poorly or Not at All
If mobile data works on the phone but not on connected devices:
- Confirm the travel eSIM is the active data line.
- Check whether the plan supports hotspot.
- Verify the APN is correct.
- Restart the hotspot.
- Disconnect all devices and reconnect one at a time.
A laptop may begin downloading updates automatically and consume a large amount of data.
WhatsApp Has No Connection
WhatsApp uses the eSIM’s mobile data but normally keeps your existing telephone number.
If WhatsApp does not connect:
- Check whether ordinary websites load.
- Turn off WiFi and test mobile data.
- Restart WhatsApp.
- Disable VPN temporarily.
- Check whether background data is restricted.
Do not re-register WhatsApp unless you intentionally want to change its account number.
Calls and SMS Do Not Work
NoveSIM plans are data-only. They do not include:
- A local Taiwanese number.
- Traditional voice minutes.
- Standard SMS.
Use WhatsApp, Viber, Messenger, FaceTime or another internet-based calling application.
Your regular SIM may still receive calls or SMS, but your home operator may apply roaming charges.
Should You Reset Network Settings?
A network reset should not be the first solution because it may remove:
- Saved WiFi networks.
- WiFi passwords.
- Bluetooth connections.
- VPN configurations.
- Other mobile network preferences.
First complete the mobile data, roaming, APN and Airplane Mode checks.
Should You Delete and Reinstall the eSIM?
No. Do not delete the eSIM because it has no internet.
Many QR codes are valid for one installation only. Removing the profile may prevent you from reinstalling it.
Keep it installed while checking:
- The active mobile data line.
- Data Roaming.
- APN.
- Plan coverage.
- Data allowance.
- Validity.
- Network registration.
Can You Top Up the Same eSIM?
NoveSIM plans cannot normally be topped up or extended using the same QR code. When the data or validity ends, purchase and install a new eSIM.
The new installation requires WiFi or another working internet connection. Complete it before your current connection becomes unavailable whenever possible.
Information to Send Customer Support
If there is still no internet after completing the checks, provide:
- Your order number.
- Your current city or area in Taiwan.
- Your phone make and exact model.
- Whether the phone shows No Service, 4G, LTE or 5G.
- A screenshot of the active mobile data line.
- A screenshot of the Data Roaming setting.
- A screenshot of the APN.
- The network name displayed by the phone.
- Confirmation that WiFi was disabled during testing.
- Whether the connection worked earlier.
Do not publicly share the full QR code, activation code or SM-DP+ details.
Related Articles
- eSIM Not Working in Taiwan
- APN Settings for a Taiwan eSIM
- Why Is My eSIM Slow in Taiwan?
- How to Use an eSIM in Taiwan
- How to Activate a Taiwan eSIM
FAQ
Why does my Taiwan eSIM have no internet?
The most common causes are an incorrect mobile data line, disabled Data Roaming, automatic switching or a missing APN.
Why do I have signal but no internet?
Signal confirms network registration, but mobile data may still fail if the APN, roaming or active data line is incorrect.
What APN should I use?
Use data.esim. Leave the username and password empty.
Should Data Roaming be enabled?
Yes. Enable it on the travel eSIM because the profile connects through supported partner networks. Keep it disabled on your home SIM.
Why does 5G appear but nothing loads?
The phone may be registered without a working data session. Check the APN, active data line, plan allowance and roaming setting.
Can an expired plan still appear in my phone?
Yes. The eSIM profile can remain installed after its data or validity has ended.
Should I delete and reinstall the eSIM?
No. Keep it installed because the QR code may be valid for one download only.
Can I top up the same Taiwan eSIM?
NoveSIM plans cannot normally be topped up on the same QR code. Purchase and install a new eSIM when additional data is required.
Final Recommendation
If your Taiwan eSIM has no internet, first turn off WiFi and confirm that the travel eSIM is selected as the active mobile data line. Enable Data Roaming on that profile and disable automatic mobile data switching.
If the phone shows signal but nothing loads, check that the APN is data.esim. Save and select the APN on Android, then refresh the connection by turning Airplane Mode on for 30 seconds.
Also confirm that Taiwan is included in the plan and that the data allowance and validity have not ended. Keep the eSIM installed throughout troubleshooting because its QR code may not be reusable.