eSIM is an abbreviation for embedded SIM, which means a built-in SIM card. Devices that support eSIM can use communication services without using a physical SIM card, and can be easily set up by simply scanning a QR code with the camera app. It is a new communication service that allows users to freely choose the communication method according to their needs, such as using it as a secondary line on their smartphone.

Conventional SIM cards are physical such as inserted and removed from smartphone slots. eSIM is a virtual SIM card built into a smartphone. Therefore, by reading a QR code, it is recognized internally in the same way as a physical SIM card. This means that smartphones that support eSIM can use plans from various carriers without the need to insert and remove the SIM card. All iPhone models sold in Japan from iphone XS are equipped with eSIM functionality. Therefore, by simply reading the QR code, you can get the same experience just like using a SIM card.

In particular, when traveling abroad, previously you would have to remove the SIM card you used in your country and insert an overseas SIM card, however now you can use an overseas SIM card plan without any troublesome process.