Activating a Taiwan eSIM is usually straightforward once the profile has already been installed on your phone. After arriving in Taiwan, you need to turn on the travel line, select it for mobile data and enable Data Roaming on the eSIM.
Installation and activation are not always the same step. Installation adds the eSIM profile to your phone, while activation allows it to connect to a supported mobile network and begin providing internet access.
For the easiest setup, install the eSIM before departure while connected to stable WiFi. Then complete the activation steps after landing in Taiwan.
Quick answer: After arriving in Taiwan, enable the travel eSIM, select it as your mobile data line, turn on Data Roaming for that profile and disable automatic data switching. If required, set the APN to data.esim.
Top Taiwan eSIMs
Install the eSIM Before Activation
The eSIM profile must normally be installed before it can connect to a Taiwanese network. Complete the installation before travelling whenever possible.
You need:
- A compatible and carrier-unlocked phone.
- A stable WiFi connection.
- The eSIM QR code or manual installation details.
- Access to your NoveSIM order information.
Do not wait until you are travelling through an area without WiFi. A working internet connection is required to download the eSIM profile.
When Should You Activate a Taiwan eSIM?
The best time to complete the mobile data activation is after arriving in Taiwan. Some eSIM plans begin their validity when they first connect to an included network, while other products may follow different activation conditions.
A practical approach is:
- Purchase the Taiwan plan before departure.
- Install the eSIM using WiFi.
- Keep your primary SIM selected before the trip.
- After landing, enable the Taiwan eSIM.
- Select it for mobile data.
- Turn on Data Roaming for the travel profile.
Always review the activation details shown with your specific plan.
Installation vs Activation
| Step | What It Does | When to Complete It |
|---|---|---|
| Purchase | Provides the eSIM plan and installation details | Before departure |
| Installation | Adds the eSIM profile to the phone | On stable WiFi before travel |
| Activation | Connects the profile to a supported network | After arrival in Taiwan |
| Mobile data setup | Directs internet traffic through the eSIM | After arrival |
How to Activate a Taiwan eSIM on iPhone
- Open Settings.
- Select Cellular or Mobile Service.
- Choose the line labelled Taiwan, Travel or NoveSIM.
- Turn on Turn On This Line.
- Enable Data Roaming.
- Return to the main Cellular menu.
- Select Cellular Data.
- Choose the Taiwan eSIM.
- Turn off Allow Cellular Data Switching.
Wait a few minutes while the iPhone searches for and registers on a supported Taiwanese network.
Recommended iPhone Activation Settings
| iPhone Setting | Recommended Configuration |
|---|---|
| Taiwan eSIM | Turned on |
| Cellular Data | Taiwan eSIM |
| Data Roaming on travel eSIM | Enabled |
| Data Roaming on primary SIM | Disabled |
| Cellular Data Switching | Disabled |
| Network Selection | Automatic |
| APN | data.esim |
How to Activate a Taiwan eSIM on Samsung
Samsung menu names can vary slightly depending on the device and One UI version.
- Open Settings.
- Select Connections.
- Open SIM Manager.
- Turn on the Taiwan or NoveSIM profile.
- Select it as the preferred SIM for mobile data.
- Return to Connections.
- Open Mobile Networks.
- Enable Data Roaming for the travel eSIM.
- Disable automatic data switching if the option is available.
Confirm that your regular SIM is not still selected as the mobile data line.
How to Activate a Taiwan eSIM on Google Pixel
- Open Settings.
- Select Network & Internet.
- Open SIMs.
- Select the Taiwan eSIM.
- Turn on Use SIM.
- Enable Mobile Data.
- Enable Roaming.
- Choose the Taiwan eSIM as the preferred data SIM.
- Disable automatic data switching.
Different Android versions may use slightly different wording, but the required configuration is the same.
How to Activate a Taiwan eSIM on Other Android Phones
On other compatible Android devices, open the SIM, mobile network or connections section and complete these steps:
- Enable the installed Taiwan eSIM profile.
- Select it for mobile data.
- Turn on Data Roaming for the travel line.
- Disable automatic SIM or mobile data switching.
- Keep network selection on Automatic.
Do not enable roaming on your home SIM unless you intentionally want to use your operator’s roaming service.
Why Data Roaming Must Be Enabled
Travel eSIMs often connect through partner networks. For this reason, the Data Roaming setting must be enabled on the Taiwan eSIM.
Turning on roaming for the travel profile does not activate roaming on your primary SIM. Each line has its own settings on most Dual SIM devices.
The recommended configuration is:
- Data Roaming enabled on the Taiwan eSIM.
- Data Roaming disabled on the home SIM.
- Taiwan eSIM selected for mobile data.
- Automatic switching disabled.
How to Set the APN
The eSIM may configure the APN automatically. If you have signal but mobile internet does not work, check the APN settings.
Use:
| APN Field | Value |
|---|---|
| Name | NoveSIM or Taiwan |
| APN | data.esim |
| Username | Leave empty |
| Password | Leave empty |
APN on iPhone
The usual path is:
Settings → Cellular → Taiwan eSIM → Cellular Data Network
Enter data.esim in the Cellular Data APN field. The menu may not be visible when the profile manages the APN automatically.
APN on Samsung
The usual path is:
Settings → Connections → Mobile Networks → Access Point Names
Create a new APN if needed, save it and select it as the active access point.
APN on Google Pixel
The usual path is:
Settings → Network & Internet → SIMs → Taiwan eSIM → Access Point Names
How to Test Whether the eSIM Is Active
- Turn off WiFi.
- Confirm that the Taiwan eSIM is selected for mobile data.
- Open a webpage or maps application.
- Wait several minutes for the first network registration.
- Check whether a mobile data symbol appears.
A signal indicator alone does not always mean that mobile data is configured correctly. Test internet access with WiFi disabled.
How Long Does Activation Take?
Activation normally takes a few minutes after the correct settings have been applied. The first connection may take longer while the phone registers on a supported network.
Activation can be delayed by:
- Weak local signal.
- Incorrect mobile data selection.
- Data Roaming being disabled.
- An incorrect or missing APN.
- Automatic switching to the primary SIM.
- Temporary network registration delays.
What to Do If the Taiwan eSIM Does Not Activate
Follow these steps in order:
- Confirm that the eSIM profile is installed.
- Check that the Taiwan eSIM is turned on.
- Select it as the mobile data line.
- Enable Data Roaming on the travel profile.
- Disable automatic mobile data switching.
- Turn off WiFi and test mobile data.
- Check that the APN is data.esim.
- Turn Airplane Mode on for 30 seconds and then off.
- Restart the phone.
- Wait in an outdoor or populated area with stronger signal.
Do not delete the eSIM while troubleshooting. Some QR codes can only be installed once.
Why the eSIM Shows No Service
No Service usually means that the phone has not yet registered on a supported network.
Check that:
- You are already in Taiwan or another included destination.
- The eSIM line is enabled.
- The phone is carrier-unlocked.
- Network Selection is set to Automatic.
- The plan is still valid.
- The device has not been placed in Airplane Mode.
Signal can also be weaker inside tunnels, underground stations, mountains and isolated areas.
Why There Is Signal but No Internet
Signal bars without working data usually indicate a configuration problem rather than a missing network.
The most common causes are:
- The home SIM is still selected for data.
- Data Roaming is disabled on the eSIM.
- The APN is missing or incorrect.
- Automatic switching has moved data to another line.
- The plan has no remaining data.
Should You Select a Network Manually?
Keep Network Selection on Automatic in most situations. The eSIM should connect to an available supported partner network.
Manual selection should normally be attempted only when automatic connection fails and customer support provides a specific network recommendation. Not every visible operator is necessarily included in the plan.
Can You Activate the eSIM Before Arriving?
You can usually install the profile before departure, but mobile network activation may require being inside the plan’s covered destination.
Turning the eSIM on before arriving is not always necessary. The safer approach is to keep the profile installed and complete the mobile data setup after landing.
Review the exact product conditions because activation rules and validity timing can vary.
Can You Keep Your Home SIM Active?
Yes. Your regular SIM can remain active while the Taiwan eSIM provides mobile data.
This allows you to:
- Keep your normal telephone number.
- Receive verification messages.
- Use WhatsApp with your existing number.
- Make internet calls through the travel data connection.
Traditional calls and SMS on the home SIM may still create roaming charges. Check your operator’s policy before using them.
Does the Taiwan eSIM Include Calls or SMS?
NoveSIM plans are data-only. They do not include:
- A Taiwanese telephone number.
- Traditional voice minutes.
- Standard SMS messages.
You can continue using WhatsApp, Viber, Messenger, FaceTime and other internet-based calling applications.
Does Activation Change Your WhatsApp Number?
No. Activating a data-only Taiwan eSIM does not normally change your WhatsApp account or registered number.
The eSIM supplies the internet connection, while WhatsApp remains linked to your existing number. Do not register the application again unless you intentionally want to change accounts.
How to Avoid Accidental Roaming Charges
| Setting | Travel eSIM | Home SIM |
|---|---|---|
| Line enabled | Yes | Optional |
| Selected for mobile data | Yes | No |
| Data Roaming | Enabled | Disabled |
| Calls and SMS | Data-only applications | May incur roaming charges |
Can You Activate the Same QR Code Twice?
Many travel eSIM QR codes are valid for one successful installation only. After the profile is installed, do not remove it in an attempt to activate it again.
If the eSIM is already visible in your phone settings, work with that profile instead of scanning the code again.
Can You Delete and Reinstall the eSIM?
Do not delete the profile during activation or troubleshooting. Removing it may permanently prevent you from reinstalling the same plan.
First check the data line, roaming setting, APN and network registration. Contact support before deleting any installed profile.
Can You Top Up the eSIM After Activation?
NoveSIM plans cannot normally be topped up or extended using the same QR code. When the data allowance or validity ends, purchase a new eSIM and install the new profile.
You need WiFi or another internet connection for the new installation, so arrange the replacement before the existing plan expires.
Activation Checklist
| Check | Correct Status |
|---|---|
| eSIM installed | Yes |
| Travel line enabled | Yes |
| Selected for mobile data | Yes |
| Data Roaming on eSIM | Enabled |
| Roaming on home SIM | Disabled |
| Automatic switching | Disabled |
| APN | data.esim |
| WiFi during testing | Turned off |
Related Articles
- How to Install an eSIM for Taiwan
- Taiwan eSIM for iPhone
- Taiwan eSIM for Android
- Does My Phone Support eSIM in Taiwan?
- Best eSIM for Taiwan
FAQ
How do I activate a Taiwan eSIM?
After arriving, enable the eSIM, select it for mobile data, turn on Data Roaming for the travel profile and disable automatic data switching.
Should I activate the eSIM before travelling?
Install it before departure on stable WiFi. Complete the mobile network activation after arriving in Taiwan unless your plan instructions state otherwise.
Why is Data Roaming required?
The travel eSIM connects through supported partner networks, so Data Roaming must be enabled on the travel line.
What APN should I use?
Use data.esim when manual APN configuration is required. Leave the username and password empty.
How long does activation take?
It normally takes a few minutes after the correct settings are applied, although the first network registration may occasionally take longer.
Why does the eSIM show signal but no internet?
Check that the eSIM is selected for mobile data, roaming is enabled and the APN is set to data.esim.
Can I keep my normal SIM active?
Yes. Keep it active for your regular number, but disable Data Roaming on the home SIM to reduce the risk of unexpected charges.
Should I delete the eSIM if activation fails?
No. Do not delete it during troubleshooting because the installation code may be single-use.
Final Recommendation
Install your Taiwan eSIM before departure using stable WiFi, but complete the mobile data activation after arriving in Taiwan. Turn on the travel line, select it for mobile data, enable Data Roaming and disable automatic switching.
If the connection does not start immediately, check the APN, toggle Airplane Mode for 30 seconds and restart the phone. Keep the eSIM installed throughout troubleshooting because the QR code may not be reusable.
With the correct activation settings, your Taiwan eSIM can provide mobile data for maps, train travel, communication, bookings and everyday sightseeing across the country.