Taiwan Roaming Charges: How to Avoid Expensive Mobile Data Fees

Taiwan roaming charges can become expensive when you use your normal mobile plan abroad without understanding your operator’s international rates. Mobile data, phone calls, voicemail and background application activity may all create charges, even when you are not actively using the phone.

The exact cost depends on your home operator, country, contract and any roaming package added before departure. Taiwan is not automatically covered by European Union roaming rules, so travellers should not assume that their domestic allowance will work there at no extra cost.

One of the simplest ways to control mobile spending is to use a prepaid Taiwan travel eSIM for data while keeping Data Roaming disabled on the primary SIM. This allows you to use maps, messaging, transport applications and internet calls without relying on standard international data roaming.

Quick recommendation: Check your operator’s Taiwan roaming rates before travel. For predictable mobile data costs, install a prepaid Taiwan eSIM, select it as the preferred data line and keep roaming disabled on your home SIM.

How Taiwan Roaming Charges Work

International roaming begins when your home SIM connects to a foreign mobile network. Your operator then charges according to its agreement with the Taiwanese network and the roaming terms attached to your account.

Charges may apply to:

• Mobile data.
• Outgoing phone calls.
• Incoming phone calls.
• Sending SMS messages.
• Receiving or accessing voicemail.
• Background application activity.
• Automatic cloud backups.
• Software updates.

The visited network provides the connection, but the final price is determined by your home operator.

Is Taiwan Included in EU Roaming?

No. Taiwan is outside the European Union and European Economic Area roaming zone. Travellers using an EU mobile plan should not assume that domestic roaming conditions apply.

Your operator may offer:

• A daily international roaming pass.
• A regional Asia package.
• A fixed travel data bundle.
• Pay-as-you-go international roaming.
• No supported roaming package at all.

Always confirm Taiwan specifically rather than relying on a general description such as international or worldwide coverage.

Types of Roaming Charges in Taiwan

Roaming Activity	How Charges May Apply
Mobile data	Per megabyte, per gigabyte or through a daily pass
Outgoing calls	Per minute or deducted from a travel package
Incoming calls	May be charged per minute
Outgoing SMS	May be charged per message
Incoming SMS	Often free, but operator terms vary
Voicemail	May create incoming and outgoing call charges

Why Mobile Data Roaming Can Be Expensive

Modern phones use data continuously. Even when you are not browsing, applications can connect in the background.

Common sources of unexpected data use include:

• Email synchronisation.
• Photo and video backups.
• Social media refreshes.
• Location services.
• Application updates.
• Cloud storage synchronisation.
• Automatic messaging downloads.
• Navigation applications.

When roaming is charged per megabyte, a short period of background activity can create a disproportionately high bill.

How Much Can Roaming in Taiwan Cost?

There is no single standard price. Some operators sell a daily pass, while others charge separately for every megabyte, call minute or text message.

The final cost can depend on:

• Your home country.
• Your mobile operator.
• Your contract or prepaid plan.
• Whether a travel package is active.
• The Taiwanese partner network used.
• The volume of data consumed.
• The length of calls.

Review your operator’s official roaming price list before departure. Pay particular attention to what happens after any daily allowance is used.

Daily Roaming Passes

A daily roaming pass allows the traveller to use a defined allowance for a fixed daily charge. In some cases, the pass activates automatically when the phone uses data, makes a call or sends a message.

Before using a daily pass, check:

• The price per day.
• How a chargeable day is defined.
• The included data allowance.
• Whether speed is reduced after a limit.
• Whether calls and SMS are included.
• Whether the pass renews automatically.
• The maximum number of chargeable days.

A daily pass can be convenient for a very short trip, but repeated daily charges may become expensive during a longer stay.

Pay-As-You-Go Roaming

Pay-as-you-go roaming charges each activity individually. This can be risky when mobile data is priced per megabyte.

It may be suitable only when:

• You keep mobile data disabled.
• You need occasional SMS reception.
• You expect only an emergency phone call.
• You fully understand the price per use.

Do not enable data roaming casually on a pay-as-you-go plan.

Roaming Package vs Travel eSIM

Feature	Home Operator Roaming	Taiwan Travel eSIM
Pricing	May be daily or usage-based	Prepaid before use
Data allowance	Depends on the operator package	Selected during purchase
Primary number	Remains active	Primary SIM can remain active separately
Local phone number	Uses your normal number	Usually not included
Cost predictability	Depends on package rules	Generally clear prepaid cost
Setup	May activate automatically	Requires eSIM installation and data settings

Why Use a Travel eSIM in Taiwan?

A travel eSIM separates mobile data from your home operator’s roaming service. You purchase a prepaid allowance and connect through a supported Taiwanese partner network.

It can provide:

• Predictable prepaid data costs.
• Mobile internet shortly after arrival.
• No physical SIM replacement.
• Access to maps and transport applications.
• WhatsApp and internet calling.
• The ability to keep the main SIM active.

A travel eSIM is particularly useful when your home operator’s roaming package is expensive or offers limited data.

Can You Keep Your Primary SIM Active?

Yes. On a dual-SIM phone, your primary SIM can remain active for calls, SMS and verification codes while the Taiwan eSIM provides mobile data.

Use the following configuration:

Phone Setting	Recommended Configuration
Taiwan travel eSIM	Enabled
Preferred mobile data line	NoveSIM or Taiwan Travel
Data Roaming on travel eSIM	Enabled
Primary SIM	Enabled only when needed
Data Roaming on primary SIM	Disabled
Automatic data switching	Disabled

Why Data Roaming Is Enabled on the Travel eSIM

A travel eSIM connects through a partner network, so the phone may classify the connection as roaming. Data Roaming therefore normally needs to be enabled on the travel eSIM.

This does not mean that your home operator is providing the data. The prepaid eSIM plan supplies the mobile connection.

The important distinction is:

• Enable Data Roaming on the travel eSIM.
• Disable Data Roaming on the primary SIM.
• Select the travel eSIM as the preferred data source.

How to Prevent Accidental Data Roaming

1. Install the Taiwan eSIM before departure.
2. Label both SIM profiles clearly.
3. Select the travel eSIM for mobile data.
4. Disable Data Roaming on the primary SIM.
5. Disable automatic cellular data switching.
6. Check which line appears next to Mobile Data.
7. Turn off background data for unnecessary applications.
8. Review mobile data usage during the trip.

What Is Automatic Data Switching?

Automatic data switching allows the phone to use the other SIM when the preferred data line has a weak or unavailable connection.

During international travel, this can cause the phone to use your home SIM for data without you noticing. Disable the feature to keep all mobile data on the Taiwan eSIM.

On iPhone, the setting may appear as Allow Cellular Data Switching. Android wording varies by manufacturer.

Should You Turn Off Your Main SIM?

Turning off the primary SIM provides the strongest protection against roaming charges, but it also prevents normal calls, SMS and verification messages from reaching that line.

You may keep it active when:

• You need banking verification codes.
• You expect important SMS messages.
• You understand the price of incoming calls.
• Data Roaming remains disabled.
• Automatic data switching is disabled.

Turn it off completely when you do not need calls or SMS and want to remove the risk of accidental use.

Can Receiving SMS Create Roaming Charges?

Many operators do not charge for receiving standard SMS messages abroad, but this is not universal. Check your operator’s policy before relying on the primary SIM for authentication codes.

Sending SMS may be chargeable, even when receiving them is free.

Are Incoming Calls Free in Taiwan?

Incoming calls may be charged while roaming. The caller may pay only their normal rate, while you pay an international roaming fee for receiving the call.

To avoid these costs:

• Reject unnecessary calls.
• Use WhatsApp or another internet calling application.
• Ask contacts to send messages instead.
• Check whether voicemail forwarding creates additional charges.

Can Voicemail Cause Roaming Charges?

Yes. Depending on the operator, an unanswered call forwarded to voicemail may create roaming charges. Listening to voicemail may create another outgoing call charge.

Before departure, consider:

• Disabling voicemail forwarding.
• Checking the cost of accessing voicemail abroad.
• Using visual voicemail over WiFi or mobile data when supported.
• Informing important contacts to use internet messaging.

Using WhatsApp Instead of Roaming Calls

WhatsApp normally keeps your existing number when the phone uses data from a Taiwan eSIM.

You can use it for:

• Text messages.
• Voice calls.
• Video calls.
• Photo sharing.
• Location sharing.
• Group communication.

NoveSIM plans are data-only, so traditional voice calls and standard SMS are not included. Internet calling applications use the eSIM data allowance.

Using WiFi to Reduce Roaming Costs

Hotel, airport and café WiFi can reduce mobile data consumption, but public networks should not be your only connection.

Use WiFi for:

• Large software updates.
• Cloud backups.
• Video streaming.
• Downloading offline maps.
• Large file transfers.

Avoid entering sensitive information on unsecured public networks unless you use appropriate security protection.

Turn Off Background Data

Background data can consume an allowance without obvious activity. Before travelling, review applications that update automatically.

Consider restricting:

• Photo backups.
• Cloud drive synchronisation.
• Automatic application updates.
• Podcast and music downloads.
• Social media video autoplay.
• Email attachments.

Download Offline Maps Before Travel

Offline maps reduce data use and provide navigation when mobile signal is weak.

Download maps for:

• Taipei.
• Taichung.
• Tainan.
• Kaohsiung.
• Hualien.
• Taitung.
• Road-trip routes.
• Mountain and coastal areas.

How Much Travel Data Do You Need?

Usage Style	Typical Activities	Plan Approach
Light	Messages, tickets and occasional maps	Small fixed-data plan
Regular	Daily maps, browsing and social media	Moderate data allowance
Heavy	Streaming, uploads and frequent navigation	Large or unlimited-style plan
Remote work	Video calls, cloud tools and hotspot	High-data plan with hotspot support

Understanding Unlimited-Style Plans

An unlimited-style plan may provide ongoing access but include a daily high-speed allowance. NoveSIM unlimited-style plans may provide 1GB of high-speed data per 24 hours, followed by reduced speed until the allowance resets.

Check whether the reduced speed is sufficient for your intended activities before relying on the plan for remote work or streaming.

Can You Use Personal Hotspot?

Personal Hotspot may be supported depending on the eSIM plan and device. It can allow a laptop, tablet or another phone to share the connection.

Hotspot use may consume significant data through:

• Video meetings.
• Cloud synchronisation.
• Automatic software updates.
• Streaming.
• Large downloads.

When Should You Install the Taiwan eSIM?

Install it before departure while connected to stable WiFi. Check the activation rule first, because some plans begin at installation while others activate at the first supported network connection.

1. Confirm that the phone supports eSIM.
2. Confirm that it is carrier-unlocked.
3. Purchase the Taiwan plan.
4. Open the QR code on another screen.
5. Add the profile through the phone settings.
6. Label it NoveSIM or Taiwan Travel.
7. Keep it installed until the trip is complete.

Dial *#06# and look for an EID to check whether the device supports eSIM.

How to Activate the eSIM in Taiwan

1. Turn off Airplane Mode after arrival.
2. Enable the Taiwan eSIM.
3. Select it for mobile data.
4. Enable Data Roaming on the eSIM.
5. Disable automatic data switching.
6. Keep roaming disabled on the primary SIM.
7. Wait several minutes for network registration.
8. Turn WiFi off and test mobile data.

What APN Should You Use?

For NoveSIM, use the following APN when manual configuration is necessary:

APN Field	Value
Name	NoveSIM
APN	data.esim
Username	Leave blank
Password	Leave blank

What If Mobile Data Does Not Work?

1. Turn WiFi off.
2. Confirm the Taiwan eSIM is enabled.
3. Select it as the mobile data line.
4. Enable Data Roaming on the eSIM.
5. Disable automatic data switching.
6. Check that the APN is data.esim.
7. Activate Airplane Mode for 30 seconds.
8. Restart the phone if necessary.

Do Not Delete the eSIM

Do not delete the travel eSIM as an initial troubleshooting step. Many QR codes are intended for a single installation and may not work again after removal.

Before deleting anything:

• Check the preferred data line.
• Confirm Data Roaming is enabled.
• Verify the APN.
• Refresh the connection.
• Check the plan validity.
• Contact support.

Can You Top Up the Plan?

NoveSIM plans cannot normally be topped up or extended on the same QR code. When the allowance is consumed or the validity ends, a new plan may be required.

Choose enough data and validity before departure to avoid needing a replacement plan during the trip.

Roaming Cost Checklist Before Departure

• Check whether Taiwan is included in your home plan.
• Review the data price outside any package.
• Check incoming and outgoing call rates.
• Check SMS and voicemail charges.
• Understand how a daily roaming pass activates.
• Install a Taiwan eSIM on stable WiFi.
• Disable Data Roaming on the primary SIM.
• Disable automatic data switching.
• Download offline maps.
• Turn off unnecessary background data.

Related Articles

• Best eSIM for Taiwan
• Buy an eSIM for Taiwan
• Best SIM Card for Taiwan
• Mobile Data in Taiwan
• How to Get Internet in Taiwan

FAQ

Is roaming expensive in Taiwan?

It can be. Costs depend on your home operator, contract and any international package. Pay-as-you-go data roaming may be particularly expensive.

Is Taiwan included in EU roaming?

No. Taiwan is outside the EU and EEA roaming zone, so domestic European roaming rules do not automatically apply.

How can I avoid roaming charges in Taiwan?

Use a prepaid Taiwan eSIM for data, disable Data Roaming on your home SIM and turn off automatic mobile data switching.

Can I keep my main SIM active for SMS?

Yes. Keep Data Roaming disabled and check whether receiving SMS is free under your operator’s international terms.

Can incoming calls cost money?

Yes. Many operators charge for receiving calls while roaming outside their standard coverage zone.

Can voicemail create roaming fees?

Yes. Call forwarding to voicemail and listening to messages may both create roaming charges depending on your operator.

Why must roaming be enabled on the travel eSIM?

The travel eSIM connects through a Taiwanese partner network, so the phone normally requires Data Roaming on that line.

Will WhatsApp keep my normal number?

Yes. WhatsApp normally remains linked to your existing number while using mobile data from the Taiwan eSIM.

What APN should I use for NoveSIM?

Use data.esim and leave the username and password blank unless different settings are provided.

Should I delete the eSIM if it does not connect?

No. Check the mobile data line, Data Roaming, APN and network settings first. The QR code may be valid for one installation only.

Final Recommendation

Do not assume that your domestic mobile allowance applies in Taiwan. Check the official roaming terms of your home operator before departure, including mobile data, incoming calls, SMS and voicemail charges.

For more predictable spending, use a prepaid Taiwan eSIM for mobile data. Install it on stable WiFi, select it as the preferred data line after arrival, enable Data Roaming on the travel eSIM and keep roaming disabled on your primary SIM. Also disable automatic data switching to prevent the phone from returning to the home SIM for data.