SIM cards have been around for just over 30 years at this point. While they’ve definitely become smaller over the years, the basic premise has stayed the same: insert the physical card into your phone to get connected. Switching phones? Just swap the SIM card. Convenient as this process is, though, it may not last very long. You can thank eSIM for that — a new standard that aims to make physical SIM cards completely obsolete.

With the release of the iPhone 14 series, Apple announced that US-bound models will no longer house a physical SIM card slot. Instead, you’ll have to download an eSIM profile during setup. Unsure about what that means? Here’s everything you need to know about eSIM, including which devices besides the latest phones support it.