VPN vs Roaming vs eSIM for Internet Abroad?

Trip planned, flight tickets ready, luggage packed... but is your internet ready? Whenever traveling abroad, the all-time popular question every traveler faces is: "Which international internet option is best?" to get the most value and best suit our travel needs. I believe many people are still confused about using a VPN, an eSIM, and Roaming, what they are, how they differ, and ultimately, which one best fits our lifestyle.

To ensure a smooth, uninterrupted trip, today Big Bull will take you on a deep dive into the details of each type. We'll compare the pros and cons, along with tips on which one to choose for your trip. I guarantee that as soon as you finish reading this article, you'll be able to make a decision instantly, ready to fly off and check in chillfully, completely worry-free about your internet.

What is a VPN?

Before we go shopping for an internet package, let's first get to know a crucial helper for security. Many of you might have heard this name often but secretly wonder What is VPN. Big Bull will explain it simply.

How a VPN Works

To make it clearer, let's look behind the scenes of this technology. A VPN (Virtual Private Network) is like a private secret tunnel on the internet that creates a simulated network covering our connection with an extra layer. When we connect to a Wi-Fi signal, all data, whether passwords, search history, or personal info—is completely encrypted. This process prevents hackers or malicious parties from intercepting our data.

Pros of a VPN

Now that we know how it works, let's see how installing a VPN elevates our internet experience:

• Protects your data: This is crucial. Especially when chilling at a cafe abroad and accidentally connecting to a free Public Wi-Fi without a password, a VPN acts as an excellent shield, preventing the theft of sensitive data like social media passwords or credit card info when shopping online.
• Changes your IP: Hide IP Address is a VPN's superpower. The system changes our IP Address to match the server in the country we choose to connect to. This conceals our true location, meaning no one knows where in the world we are surfing from.
• Accesses websites or services from other countries: Have you ever been abroad and wanted to watch your favorite series on a Thai streaming platform, only for the system to say the content is only available in Thailand? Changing your IP Address via a VPN allows us to tunnel through regions to watch content or freely access websites that are blocked in that country.
• Ideal for Public Wi-Fi: Traveling inevitably involves using Wi-Fi at airports or hotels. Having a VPN gives you peace of mind every time you connect, allowing you to securely make transactions via banking apps without worry.

Limitations of a VPN

Of course, every technology has precautions to consider. A VPN is not a direct internet provider; you must have a basic internet connection on your device first before you can connect to a VPN. Additionally, internet speed might drop slightly sometimes, depending on the server's quality and the distance to the country you choose to connect to.

What is an International eSIM?

Once security is sorted, let's move on to internet connectivity. Let's get to know the trendy innovation of this era: the eSIM.

What is an eSIM?

For those unfamiliar, an eSIM (Embedded SIM) is a digital format SIM card with a tiny chip embedded directly into the smartphone's motherboard from the factory. This means we no longer need to carry a SIM ejector tool to swap physical SIM cards like before. It's a technology designed to perfectly meet the convenience needs of modern users.

Pros of an International eSIM

Using an eSIM for traveling abroad has advantages that make many people love it so much they never want to go back to traditional SIMs. Let's see what they are:

• Easy to register: The purchasing process is simple. Just buy it through a distributor's website, and you'll receive a QR Code directly in your email. You just scan it, tweak a few settings on your device, and it's ready to use. No need to waste time waiting for a SIM card in the mail.
• No need to change SIMs: Say goodbye to the problem of losing your primary SIM card while traveling abroad. An international eSIM allows us to seamlessly activate the internet while keeping our original number on standby for incoming calls, all on a single device.
• Instant activation: As soon as the captain announces landing, you can simply toggle the settings on your phone to use the eSIM network instantly. Whether you need to reply to work chats, update social media, or call a taxi to the city, you can do it in real-time.

Limitations of an eSIM

Before deciding to buy, Big Bull wants you to check these limitations first. The most important thing is that not all smartphones on the market support eSIM functionality. You must check your device's specs carefully before ordering. Also, some eSIM packages might have usage limits or restrict Mobile Hotspot sharing, making it less convenient to use or share internet with your travel buddies.

What is Roaming?

Now for the most classic and powerful alternative for those who prioritize convenience without having to overthink: turning on roaming.

How Roaming Works

If a friend on the trip asks,What is Roaming,Big Bull explains that it is an automatic international roaming service from your primary mobile network in Thailand. Your mobile carrier signs agreements with partner networks abroad, allowing your original SIM card to directly connect to the signals in that country.

Pros of Roaming

When it comes to strengths, this service wins hands down in terms of speed and after-sales service. Convenience is what Roaming offers to the max. We don't have to deal with complicated new device settings. Just dial the code to subscribe to a package before traveling, and you can instantly use your original number to receive calls, make calls, get SMS alerts, or wait for OTP codes from banks and credit cards. Plus, the internet signal is usually very stable and offers great coverage.

Limitations of Roaming

Despite its convenience, there are things to watch out for. Typically, roaming package prices are significantly higher than buying a local SIM or an eSIM. And the most crucial thing to be careful of is "bill shock" (data leakage). If we accidentally leave the internet turned on without a covering package, or if the package expires mid-trip, we might face a bill of thousands or tens of thousands of baht at the end of the month.

Comparison Table: VPN vs eSIM vs Roaming

To provide a clear overview that's easy to compare, Big Bull has summarized the main features of all 3 types in this table. Compare them to see which one best meets your needs!

Feature	VPN	International eSIM	Roaming
Key Highlights	High security, bypasses geo-blocks, changes IP on demand.	Easy online purchase, fast, no hassle of swapping physical SIM cards.	Maximum convenience, receive SMS for OTP verification with original number anytime.
Recommended Trip Duration	Suitable for all durations (highly cost-effective for long-term stays of 1+ months or studying abroad).	Suitable for short to medium trips (1-2 weeks); packages easily match exact travel days.	Suitable for short trips (3-7 days); focuses on temporary speed and convenience.
Connectivity	Requires a base internet connection first before connecting to the system.	Provides direct internet (Data) connection to the device.	Provides both internet (Data) and calling (Voice) connections.
Convenience	Download the app, subscribe to a package, and click to connect to a server.	Scan a QR Code from email, adjust minor device settings, and it's ready to use.	Just dial a code to subscribe; turn it on and use it as soon as the plane lands.
Price & Value	Highly cost-effective; pay once and share protection across multiple devices.	Great price and highly affordable; various packages available based on data usage.	Higher price than other options, trading cost for premium speed and convenience.

Which Travel Internet is Best?

Reading up to this point, many of you probably have a broad picture of your options. But if you are still hesitating and wondering, "Which travel internet is actually best?", remember that apart from your lifestyle, trip duration and budget/value are crucial variables to consider. Big Bull  recommends making your choice based on the main use cases of your trip:

VPN: Need Security or Staying Long-Term

For those who need to handle financial transactions, transfer money, shop online, or like to work and check emails at cafes and public spaces, a VPN is an absolute must. It hides your IP Address, encrypts your data, and prevents personal info from leaking to hackers.

Moreover, for those traveling to study, work, or take a long-term vacation (Long Stay) abroad, buying a monthly or yearly VPN package is a much more cost-effective investment. One subscription covers multiple devices simultaneously and allows you to freely access Thai content, streaming platforms, or websites anytime while abroad.

eSIM: Short Trips Abroad, Focusing on Value

For adventurous travelers focusing on short trips of about 1-2 weeks who want value coupled with high flexibility, an international eSIM is the perfect answer. It's easy to manage, you can buy packages for the exact number of days you need, it activates quickly, and you don't need to carry multiple spare SIM cards in your bag. Plus, it gives you clear budget control—pay only for what you use, with no worries about retroactive bills.

Roaming: Don't Want to Change SIMs, Focusing on Maximum Convenience

For those taking short 3-7 day trips who don't want the hassle of configuring their smartphone and have a flexible internet budget, Roaming is the best answer. Especially for business people who need to receive urgent work calls, or shoppers who need OTPs to confirm credit card payments throughout the trip. Using a Roaming package from your current carrier provides peace of mind, continuous usage, and maximum convenience.

The Best Alternative

Big Bull recommends that the best solution for modern travel is using an eSIM together with a VPN.

You get high-speed internet at an affordable price from the international eSIM as your main connection base, and then you run a VPN app over it to increase security and freely access content from around the world. It's the most cost-effective and comprehensive pairing for real-world usage.

Should You Use a VPN with an eSIM?

Many might wonder, "If I already have an eSIM for the internet, do I still need a VPN?" Big Bull believes that using both together perfectly enhances performance and covers each other's blind spots.

Imagine real-world usage while traveling: While out exploring, you pull internet from the eSIM to use map navigation, search for restaurants, or update your socials, leaving the VPN running in the background to secure your data.

Then, when you reach your accommodation, or while waiting at a cafe or airport, Big Bull's trick is to switch to the venue's free Wi-Fi while keeping the VPN turned on. 

This method not only hides your IP Address and prevents data leaks from Public Wi-Fi, but it also saves your eSIM data allowance for when you actually need to go out. It's a strategy that answers the need for security while helping you manage a limited data cap cost-effectively throughout the trip.

The Best VPN for Travelers and Going Abroad

When choosing a VPN for traveling abroad, picking just any random one is not recommended! Big Bull can tell you that a VPN truly suited for travelers must have features that make life easier and safer while away from home. Let's check the list of features a good travel VPN should have:

• Comprehensive and Stable Servers: It must have servers in your destination country, and most importantly, stable speeds for the specific destinations you want to connect back to. This ensures you can tunnel your IP Address back to make transactions via banking apps or watch Thai streaming platforms without buffering.
• Effectively Bypasses Restrictions: For anyone planning to visit China or countries that block social media, the VPN must have technology capable of piercing through network restrictions (like the Great Firewall) so you can continue communicating via Line, Facebook, IG, or TikTok normally.
• Easy-to-use Application: When traveling, you want to spend time absorbing the atmosphere. A VPN app should be designed for easy connection in just a few clicks, allowing you to switch countries quickly without messy system configurations.
• Dedicated Support Team: This is very important. When connection issues arise abroad, having a Thai support team that you can message for immediate troubleshooting will give you immense peace of mind during your trip.

If you are looking for a helper with all the features on this checklist, Big Bull  highly recommends BullVPN. It is an application designed specifically for Thais, easy to use, with servers worldwide (including Thailand), easily bypasses the Great Firewall in China, and has a Thai support team on standby for consultation throughout your trip. Having it installed on your device guarantees peace of mind for every single connection!

No need to be confused on your next trip anymore! VPN, eSIM, and Roaming each have distinct strengths that cater to different usage needs. But if you want your trip to be as smooth and secure as possible, Big Bull recommends getting an eSIM as your primary internet connection, and keeping a VPN turned on to protect your personal data. Let BullVPN take care of your security and take you surfing the internet freely. No matter where you check in, you can browse the web confidently and without limits.

FAQ

Can a VPN be used as internet instead of an eSIM? 

Not at all. A VPN system is not a direct internet provider. You must first have a base internet connection from Wi-Fi, an eSIM, or a Roaming package before you can open the application and use a VPN.

Which is cheaper, an eSIM or Roaming? 

When comparing the exact same amount of data, an international eSIM usually offers much better value and is significantly cheaper than Roaming. It is ideal for those who need a large amount of internet at a more budget-friendly price.

Is a VPN necessary if I already have an eSIM? 

Absolutely necessary. An eSIM only functions to provide an internet signal, but a VPN provides security—especially when you stop to connect to free Public Wi-Fi along the way. It is also the key tool that helps you tunnel your IP Address to watch series or access applications that are blocked in that destination country.

Should I use a VPN or an eSIM when traveling to China?

Big Bull recommends using both together. China has a very strict application-blocking system (the Great Firewall) covering platforms like Line, Facebook, and IG. No matter how fast your eSIM internet package is, you won't be able to access these apps normally. Downloading a VPN app beforehand while still in Thailand and using it alongside your internet will ensure you can use social media, contact your family, and surf the internet freely.