An eSIM is an electronic, or embedded, SIM. That is just similar to the normal SIM but Instead of a physical card, eSIM technology is built right into your phone. It’s a small chip that’s used to authenticate your identity with your carrier. The dual-SIM users should not be worried as the eSIM technology supports multiple accounts and switching between is easy. With an eSIM, your phone has some new settings devoted to your SIM card that allow you to switch between lines and carriers and manage accounts.