What's an eSIM and why is it important for the future of mobile?An eSIM stores your activation information on your phone, eliminating the need to use a physical SIM card in your phone. This also makes it much simpler to activate always-connected PCs and tablets for data service.
Source: What's an eSIM and why is it important for the future of mobile? (https://www.androidcentral.com/difference-between-sim-and-esim-and-what-future-holds)