What is an eSIM? What are the differences between an eSIM and a physical SIM card?

An eSIM is an embedded SIM card, is a digital "invisible" electronic SIM card that is directly soldered inside the device, eliminating the need for a removable physical card slot.

A physical SIM card is a removable physical card that needs to be manually inserted into the device's card slot. The core difference is that eSIMs require no physical operation and can be remotely configured for use.