What is eSIM? How Does It Work? Advantages, Disadvantages, and Usage Abroad

There has been so much talk about eSIM in recent years that everyone who buys a new phone or plans to travel abroad has similar questions in their mind: “What is eSIM, how to get it, which phones support it, is it really advantageous?”
In the article below, we will go over these questions that users most frequently ask in search engines.

What is eSIM and what is it used for?

eSIM (embedded SIM) is a digital SIM technology that's built into your phone, eliminating the need for a physical card. This means a programmable chip embedded in the device digitally stores your mobile phone's ID information.

Briefly:

• Instead of inserting a small plastic card into the SIM card slot,
• You received from the operator QR code or with activation code
• You describe your line to the phone as “digital.”

In this way, operations such as line change, number portability, and operator change become much faster and more practical.

How does eSIM work?

The logic is simple: Your carrier assigns you an eSIM profile. This profile is loaded onto your device using a QR code or activation code.

The general process works as follows:

1. You are using an eSIM compatible phone or device.
2. You request an eSIM from the operator (online application, store or call center).
3. A QR code or activation information is sent to you.
4. You go to the "Add eSIM / Cellular Plan" menu in your phone's settings and scan this code.
5. The line profile is downloaded to the phone and becomes active within a few minutes.

Since there is no physical card exchange, the entire transaction takes place completely digitally.

Differences between eSIM and classic SIM

Similarity: They both do the same job: connect you to the mobile network.

The differences are quite clear:

• No physical card: eSIM does not have a plastic card that you can insert and remove.
• Remote management: Operators can turn your line on and off remotely, and you can add and delete profiles.
• Multiple profiles: You can store multiple eSIM profiles on the same device (work – private line, travel line, etc.).
• Double line flexibility: It is possible to use dual lines in many models with the eSIM + physical SIM combination.

In short, the classic SIM offers a more “hardware” experience, while the eSIM offers a more “software and manageable” experience.

Advantages of eSIM (why has it become so popular?)

The reason users search for "eSIM benefits" is that this technology truly makes everyday life easier. The most prominent advantages are:

No physical card hassle

• Problems like the card being lost, broken, not making contact, accidentally cut with scissors, etc. are history.
• The trouble of searching for a dealer to get a new SIM is reduced.

Number portability and operator switching are much faster

You no longer have to wait for a card when switching carriers. You can switch to eSIM through the call center or mobile app and activate your line in minutes.

Great convenience in dual line use

• You can use your business line as a physical SIM and your private line as an eSIM on the same phone.
• When you go abroad, you can add a separate eSIM profile just for data and use it without deactivating your main number.

Significant cost advantage in travel

Instead of waiting in line at the airport when you go abroad, you can purchase a travel eSIM package online before or while you're there and instantly install it with a QR code.

Security advantage

Because eSIM doesn't involve a physical card, traditional risks like cloning, theft, and hijacking are reduced. If the device is lost, your line can be remotely deactivated.

Disadvantages of eSIM and things to consider

As with any technology, eSIM also has some drawbacks:

• Device compatibility: Not every phone supports eSIM, especially older models.
• Operator support: TurkeyAlthough major operators offer eSIM in , the same flexibility may not be available for every tariff or every sub-brand.
• A matter of habit: Some users prefer the convenience of “just see the card and put it in their pocket”; managing their digital profile may feel foreign at first.
• Dependency on a single device: With a physical SIM, removing the card and inserting it into another phone was a matter of seconds; with an eSIM, a re-activation process is required when switching to a new device.

However, it is still possible to say that for most users, the advantages outweigh the disadvantages.

Which phones and devices support eSIM?

This question is one of the most typed in search engines: “Which phones have eSIM?”

The general table is as follows:

• Apple
  • It started with the iPhone XS/XR,
  • iPhone 11, 12, 13, 14 and all subsequent series have eSIM support.
  • Some iPad Pro, iPad Air, and Apple Watch models also use eSIM.
• Samsung
  • Generally, Galaxy S20 and later are in the upper segment S series,
  • Some Fold / Flip models have eSIM support.
• Google Pixel
  • Many models after the Pixel 2 have eSIM support.
• Other brands
  • eSIM feature is offered in certain mid- to upper-range models of brands such as Xiaomi, Oppo, Sony, and Huawei.

Since devices sold in Türkiye and operator compatibility are updated over time, if you are going to buy a new phone, it is useful to search for the model + “Does it support eSIM?”

How to get and activate eSIM in Türkiye?

“How to get an eSIM?” Although the answer to the question may vary slightly depending on the operator, the basic process is similar:

1. Your eSIM-supported phone make sure it is.
2. To convert your current line to eSIM or get a new eSIM line, your operator:
   • You can go to the store,
   • You can use the mobile application,
   • You can call customer service.
3. You will be provided with a QR code and activation information.
4. On your phone:
   • On iPhone: Settings → Cellular → Add Cellular Plan → Scan QR code
   • On Android (Samsung example): Settings → Connections → SIM card manager → Add mobile plan → Scan QR code
5. After a short wait, your line will be activated.

Some operators also offer fully online eSIM migration with new ID + e-Government verification.

How to use eSIM abroad?

The most frequently asked question by travellers is: “How to use eSIM abroad, is it really cheaper?”

General scenarios:

1. Buying a travel eSIM
   • Before you go, get in touch with an online provider
   • Or you can get an eSIM data package from the operator in the country you are visiting.
   • You will receive a QR code via email and you will define it on your phone.
2. Dual-line use
   • Your primary line remains registered as your number in Türkiye.
   • You can use the travel eSIM only for internet (data).
   • You can avoid roaming charges by making your calls via applications such as WhatsApp, FaceTime, Messenger.
3. Full transition
   • Some users prefer to disable their Türkiye line during their trip and use only their travel eSIM.
   • It is also possible to keep two separate eSIM plans active at the same time, especially on iPhones.

In recent years, many travelers have started to prefer eSIM because they say, "I can access the internet without having to search for a SIM card at the airport or stand in line."

Number portability and operator switching with eSIM

Another popular search: “Can my number be transferred with eSIM?”
Answer: Yes, the logic is exactly the same, the process is faster.

• When transferring your existing number to a different operator, you can choose to use it as an eSIM.
• Instead of waiting for a physical card, the operator sends you a QR code after the transfer is approved.
• You can define this profile on your phone and start using it with your new operator in a short time.

The eSIM option is preferred especially in line porting campaigns because it increases the process speed.

Is eSIM safe?

Questions like, “If the card doesn't exist, can't it be stolen? Can't it be copied?” are asked very frequently.

On the security side, eSIM has significant advantages:

• Someone who gets hold of the physical SIM card can use your line by inserting it into another phone.
• In eSIM, the profile is embedded in the device and protected by encryption.
• If your device is lost, you can cancel your line remotely through your operator.
• Since there is no card swapping, the risk of “SIM swap fraud” is reduced.

Of course, 100% perfect security is not available anywhere; but it is possible to say that it offers a more modern and controllable structure than the physical SIM.

eSIM or classic SIM? Which one is better for you?

At this point, the choice depends entirely on your usage habits:

eSIM might make more sense for you if;

• If you travel abroad frequently,
• If you want to use more than one line on the same phone,
• If you like to change your operator without having to deal with the dealer, you can do it through the application.
• If you are tired of situations such as losing or breaking cards.

A classic SIM may still work for you if:

• If you are using an old phone and your device does not support eSIM,
• If you like the convenience of “I just take out the card, put it in another phone, and it will work immediately”
• If you want to approach technological transitions cautiously and wait a little longer.

Today, most users buy new phones “Let there be eSIM and let it stay” In other words, eSIM is no longer a luxury; it has become a standard feature of the near future.

Frequently asked Questions

Is there a fee for eSIM?

Operators' pricing policies for eSIMs can vary. Some operators offer the first switch free of charge, with subsequent profile changes subject to a fee. Campaigns are updated periodically, so you can find the most accurate information on your operator's official website.

If I delete my eSIM, will my line be cancelled?

Deleting an eSIM profile from your phone doesn't completely delete your line's registration with your carrier. However, you may need to obtain an activation code/QR code from your carrier to use it again. It's important to consult your carrier's instructions before deleting a profile.

What can I do if my phone does not support eSIM?

• If your device does not support eSIM, you can continue with the classic SIM.
• If you are planning to change phones soon, be sure to check the "eSIM" feature in the technical specifications of the model you are purchasing.

Can I use eSIM for both Türkiye and travel lines at the same time?

Many newer phones allow you to store multiple eSIM profiles simultaneously; some even allow you to keep two eSIM plans active simultaneously. For example, on iPhones, you can use a travel eSIM as a secondary data plan while keeping your primary phone active.

eSIM is close to becoming the new norm of mobile communication

In short, eSIM is a technology that offers significant flexibility for both everyday use and international travel, seemingly a natural evolution of the physical SIM. As device compatibility and carrier support expand each year, traditional SIM cards are gradually fading into the background.

When buying a new phone or considering transferring your phone line, asking the question "Does it support eSIM?" has become almost mandatory.