Staying connected abroad no longer means choosing between expensive roaming and a physical SIM card. With a travel eSIM, you can get mobile connectivity directly on a compatible smartphone without visiting a store or replacing your existing SIM.

But there is an important decision to make before buying one: Do you need a data-only eSIM, or should you choose an eSIM that also supports calls and SMS?

The right choice depends on how you use your phone while travelling. If you mainly need Google Maps, WhatsApp, email, social media, and travel apps, data may be enough. If you need traditional phone calls or SMS, a plan with voice and messaging support may be more suitable.

Planning an international trip? eSIMLLY offers flexible travel eSIM plans across 160+ countries. Choose the destination and data package that fits your journey, without the hassle of changing physical SIM cards. Check all countries and plans here.

What Is a Data-Only eSIM?

A data-only eSIM provides mobile internet without a traditional mobile phone number for voice calls and SMS.

Once activated, you can use your phone's internet connection for services such as:

• Google Maps and navigation

• WhatsApp and Messenger

• Email

• Social media

• Ride-hailing apps

• Online translation

• Hotel and travel apps

• Video calls through internet-based services

For many travellers, this is all they need.

Most everyday communication has already moved to internet-based apps. Instead of making a traditional international call, you might send a WhatsApp message or make a voice call through an internet app.

This makes a data-only travel eSIM a simple and affordable option for many holidays. eSIMLLY provides flexible eSIM plans across 160+ countries, so you can choose connectivity for your specific destination. Explore eSIMLLY's countries and plans.

What Is an eSIM With Calls and SMS?

An eSIM with calls and SMS can provide traditional cellular voice and messaging services in addition to mobile data, depending on the specific plan.

This can be useful if you need to call local businesses, receive SMS verification codes, contact people who don't use messaging apps, or maintain conventional telephone communication while travelling.

The exact features vary by provider and plan. Some eSIMs may include a phone number, while others may offer data only.

Before purchasing, check whether the plan specifically includes voice calls, incoming calls, outgoing calls, SMS, and a phone number.

If traditional calling matters during your trip, compare the plan details carefully before buying. eSIMLLY offers flexible travel eSIM options across 160+ countries, allowing you to check what's available for your destination before travelling. Find your country and plans here.

Data-Only eSIM vs Calls and SMS eSIM

Why Choose a Data-Only eSIM?

For ordinary travel, data-only eSIMs are often enough.

Think about what you actually use your phone for during a holiday. You probably open maps to find a restaurant, message your hotel, check flight information, book a ride, translate something, upload a photo, or call someone through WhatsApp.

All of these activities work over mobile data.

You also don't need to worry about changing your primary SIM card. On compatible devices, your regular SIM can remain installed while the eSIM handles your travel data.

For travellers who mainly need internet access, eSIMLLY offers a convenient alternative to traditional roaming. With coverage across 160+ countries and flexible plans, you can choose the connectivity that matches your trip. Check eSIMLLY's available countries and plans.

Why Choose an eSIM With Calls and SMS?

A plan that includes calls and SMS makes more sense when traditional telecommunications are important to you.

For example, you might need to:

• Call a hotel directly.

• Contact a local tour operator.

• Make restaurant reservations by phone.

• Receive traditional SMS messages.

• Contact businesses that don't use messaging apps.

• Have a local number for practical reasons.

• Make conventional calls during your trip.

Business travellers may also prefer a plan with calling capabilities because not every professional contact will communicate through an internet messaging platform.

If your trip depends on traditional voice or SMS, look specifically for an eSIM plan that includes those services. eSIMLLY lets you compare destination-specific options across 160+ countries. Browse countries and available plans.

Do You Need a Phone Number When Travelling?

Not necessarily.

For many international travellers, a phone number is less important than having reliable mobile data.

Apps such as WhatsApp, Telegram, Messenger, FaceTime, and other internet-based communication services allow travellers to communicate without making traditional cellular calls.

You can also continue using your existing number for many messaging services while using a separate travel eSIM for data, depending on how your device and apps are configured.

However, there are situations where a traditional number remains useful. Some businesses only accept phone calls, while certain services may require SMS-based verification.

Before choosing a data-only eSIM, think about your actual communication needs. If you only need internet access, a data plan can keep things simple. eSIMLLY offers flexible options across 160+ countries so you can choose based on your destination and requirements. Check the plans.

Data-Only eSIMs Are Great for Short Trips

Taking a three-day city break? A data-only eSIM can be particularly convenient.

You can arrange your connectivity before leaving home and use mobile data immediately after arriving, subject to the plan's activation requirements.

There's no need to spend your first hour at the airport looking for a SIM retailer. You can head straight to your hotel, open your maps, and start exploring.

For short holidays, simplicity often matters more than having every possible mobile feature.

eSIMLLY is built around this flexibility. Travellers can select eSIM plans for destinations across 160+ countries and choose an option appropriate for their trip. See all countries and plans on eSIMLLY.

Calls and SMS Can Be Useful for Longer Trips

Longer trips can create different requirements.

If you're staying abroad for several weeks or months, having a traditional phone number can make communication with local businesses, accommodation providers, employers, or service providers easier.

It can also be useful if you're travelling somewhere where internet-based communication isn't universally used.

However, don't assume that every eSIM with a phone number includes unlimited calls and SMS. Plan allowances vary, so always check the included services.

For longer journeys, compare your options carefully rather than buying the first eSIM you find. eSIMLLY provides flexible travel eSIM choices across 160+ countries, making it easier to find a plan suited to your destination. Explore countries and plans.

Which eSIM Is Better for WhatsApp?

If you mainly use WhatsApp, a data-only eSIM is usually sufficient.

WhatsApp messages, voice calls, video calls, photos, and other features use an internet connection rather than traditional cellular SMS or voice services.

The same applies to many other internet-based communication platforms.

This is one reason data-only travel eSIMs have become popular: travellers can use the communication apps they already rely on without needing a separate local phone number.

If your travel communication happens mostly through apps, a flexible data-only eSIM may be all you need. eSIMLLY offers plans in 160+ countries, making it easy to find an option for your next destination. Check your country and available plans.

What About SMS Verification Codes?

This is where travellers should pay attention.

Some websites and apps use SMS verification codes to confirm your identity or authorise a login. A data-only eSIM generally won't receive traditional SMS messages because it doesn't provide a conventional mobile number.

If you regularly need SMS verification while abroad, keep your primary SIM active if your phone supports dual SIM functionality.

You should also check your home carrier's roaming charges before using your primary SIM for calls or SMS.

For travellers who need traditional SMS, don't assume every eSIM supports it. Check the exact plan features before purchasing. eSIMLLY provides destination-specific travel eSIM options across 160+ countries. View the available plans.

Can You Keep Your Existing Number With a Travel eSIM?

On compatible dual-SIM devices, you can often keep your regular SIM installed while using a travel eSIM for mobile data.

This setup can be useful because you don't have to abandon your normal number while travelling.

You can configure the travel eSIM as your preferred data line while keeping your primary SIM available for services that require your existing number.

However, using your primary SIM abroad may still trigger roaming charges, depending on your carrier and settings.

A travel eSIM can therefore be used alongside your existing SIM to give you more control over connectivity. eSIMLLY offers flexible plans across 160+ countries. Check the destination and plans that work for your trip.

How to Choose Between Data-Only and Calls + SMS

The decision is fairly simple.

Choose a Data-Only eSIM If:

• You mainly use WhatsApp or other messaging apps.

• You need maps and navigation.

• You want affordable mobile data.

• You rarely make traditional phone calls.

• You don't need a local phone number.

• You're taking a short holiday.

• You want a simple setup.

Choose an eSIM With Calls and SMS If:

• You need a traditional phone number.

• You expect to make regular cellular calls.

• You need to receive SMS.

• You need to contact local businesses by phone.

• You're travelling for an extended period.

• Your work requires conventional calls and messaging.

The best travel eSIM is the one that matches how you actually use your phone. eSIMLLY gives travellers flexible choices across 160+ countries, so you can compare the available options for your destination instead of paying for features you don't need. Explore eSIMLLY's country plans.

Is a Data-Only eSIM Cheaper?

Often, data-only plans can be less expensive because they don't include traditional voice and SMS services.

But price isn't the only factor. Buying a plan with features you never use is still unnecessary spending, while choosing a data-only plan when you need SMS could create problems later.

The smart approach is to identify your actual requirements first and then compare plans based on data, validity, coverage, calls, and SMS.

eSIMLLY focuses on flexible travel connectivity, with eSIM plans available across 160+ countries. Check your destination, compare the available packages, and choose the plan that fits your travel needs. View all countries and plans.

Final Verdict

For most holidaymakers, a data-only eSIM is enough.

If your phone usage revolves around maps, messaging apps, social media, email, translation, ride-hailing, and other online services, there's little reason to pay extra for traditional voice and SMS.

An eSIM with calls and SMS, however, is the better choice when you need a conventional phone number or expect to make and receive traditional calls and messages.

The key is to check the details of the individual plan rather than assuming every eSIM works the same way.

With eSIMLLY, you can find flexible travel eSIM plans across 160+ countries and choose connectivity based on your destination and data needs. Whether you need a simple data connection or a plan with additional features, check what's available before your trip.

Check your country and explore all eSIMLLY plans here.

FAQs: Data-Only eSIM vs Calls and SMS eSIM

What is a data-only eSIM?

A data-only eSIM provides mobile internet without traditional cellular voice calls and SMS. It is suitable for using maps, messaging apps, social media, email, and other online services.

Is a data-only eSIM enough for travelling?

For many travellers, yes. If you mainly use internet-based apps such as WhatsApp, Google Maps, Messenger, and email, you may not need traditional calls or SMS.

Can I make WhatsApp calls with a data-only eSIM?

Yes. WhatsApp voice and video calls use internet data, so they can work with a data-only eSIM.

Can I receive SMS on a data-only eSIM?

Generally, no. Data-only eSIMs typically don't provide a traditional mobile number or SMS service. Check the specific plan before purchasing.

Does an eSIM with calls and SMS have a phone number?

Plans that include traditional calls and SMS generally provide a phone number, but the exact features depend on the provider and destination.

Can I use my normal SIM and a travel eSIM together?

Compatible dual-SIM smartphones can often use a physical SIM and eSIM simultaneously. This allows you to keep your normal number while using the travel eSIM for data.

Which is better: data-only eSIM or eSIM with calls?

It depends on your needs. Data-only is ideal for most travellers who use internet-based apps, while an eSIM with calls and SMS is better if you need traditional cellular communication.

Where can I find an affordable international eSIM?

eSIMLLY offers flexible travel eSIM plans across 160+ countries. Check your destination and available plans here.