An eSIM is a digital SIM card. It's a small chip embedded in your device and can be programmed to act like a traditional SIM card. The main advantage is that it can be reprogrammed with different carrier profiles, which allows users to switch network providers without needing to physically swap out a SIM card.

Profile Storage: An eSIM can store multiple carrier profiles, but only one can be active at a time. This makes it easier for users to switch between carriers or plans.

Activation and Switching: When you want to activate an eSIM or switch profiles, you'll typically use the device's software. For instance, on a smartphone, there would be an option in the settings to manage eSIM profiles.

QR Code Scanning: Typically, when you sign up for a new plan with a carrier that supports eSIM, they might provide a QR code. Scanning this QR code with the device's camera can download the carrier's profile and set it up on the eSIM.

Remote Provisioning: eSIM technology supports remote provisioning, which means carriers can update or change their profiles without any physical interaction needed from the user's end.

Flexibility: Users can switch between carriers or plans more easily, without needing a new physical SIM card.

Space-Saving: No need for a SIM card slot, which can help make devices smaller or free up space for other components.

Ideal for IoT: eSIMs are especially useful for the Internet of Things (IoT) devices, where it might be impractical to use physical SIM cards.

Travel: For frequent travellers, eSIM can be a boon. They can simply download the profile for a local carrier in the country they're visiting rather than buying a local SIM card.

Durability: No need for a physical SIM card slot can mean fewer openings and potentially increased water and dust resistance.