Differences between iSIM and eSIM
eSIMs are similar to traditional SIM cards in that they have a dedicated chip that stores SIM information. However, eSIMs are much smaller than traditional SIM cards, making them ideal for use in smaller devices like wearables and IoT devices.
Unlike physical SIM cards that require a dedicated slot or eSIM/eUICC that needs a separate chip for setup, iSIM is not soldered onto the device's circuit board. Instead, it has a designated area on the system on chip (SoC) on a cellular module with tamper-resistant protection. Similar to eSIM, iSIM enables remote provisioning of network profiles by connectivity providers.