What is eSIM?
Differences from conventional SIM cards
Understand in 5 minutes
A SIM card is essential for smartphone communications, and recently, the term "eSIM" has become more common.
In this article, we'll explain in 5 minutes what eSIM is, how it differs from a traditional SIM card, and what benefits it offers.
What is a SIM card?
A SIM (Subscriber Identity Module) card is a small IC chip that contains "communications contract information" for communications (telephone and internet) on mobile devices such as smartphones.
By plugging this into your smartphone, you will be able to use each carrier's communication lines.
What is eSIM?
An eSIM (embedded SIM) is a SIM that is pre-installed in the device itself. There is no need to replace a physical card; you can switch your communication contract using a QR code or a dedicated app.
In other words, it is a new SIM system that allows you to switch SIM cards within your smartphone without having to swap them out.
Compare the differences with conventional SIMs
| item | Traditional SIM card | eSIM |
|---|---|---|
| shape | Physical card (nanoSIM, etc.) | Built-in terminal (chip) |
| Replacement | Required (replace with pins, etc.) | Not required (switching only in settings) |
| Multi-line management | Difficult (requires swapping cards) | Easy (can be switched in settings) |
| Possibility of loss | can be | none |
| Immediate activation | In-store or mail delivery required | Can be completed online |
Benefits of eSIM
Ready to use
Simply apply online and scan the QR code to activate your card.
No need to swap SIM cards
It's very easy to use and there's no need to worry about losing or damaging it.
Convenient for overseas travel
You can add a local eSIM to use it as a dual SIM, allowing you to avoid expensive international roaming and keep your communication costs down.
Multiple lines can be used
You can switch between the main line and the secondary line using just one smartphone.
Important points to note about eSIM
Cannot be used on smartphones that do not support eSIM
For iPhones from the XR onwards, and for Android only some models, it is only compatible, so you will need to check whether your device is compatible.
Your carrier must support eSIM
If the distance learning provider does not support it, you will not be able to secure a connection. It is a good idea to check in advance.
summary
eSIM is the new standard for mobile communications.
This convenient system frees you from the need for physical cards and allows you to switch communication lines simply by changing the settings on your smartphone.
eSIMs will be particularly beneficial for those who travel abroad, use dual SIM cards, and want the convenience of online procedures. When choosing your next smartphone, be sure to check whether it supports eSIM.
