With eSIM, you can connect your device to the mobile network without a physical SIM card. The eSIM is above all recommended for using additional phone numbers with the same smartphone (dual SIM mode).
An eSIM consists of two components:
1. The eSIM Chip, which is permanently installed in the device and stores eSIM profiles.
2. The eSIM profile, which is your personal SIM profile and contains all required information. You simply download your profile to your device; the download process differs depending on your device.