Hey everyone! You probably remember me from the original eSIM + Dual SIM Q&A of iOS 12. There have been some new changes to eSIM in iOS 13, thus I am starting a new Q&A specific to the new eSIM features of iOS 13. If you discover new features, please add them to this Wiki! New features Dual-SIM simultaneous calls: you can now place calls on two different lines at the same call, and call waiting works for incoming calls on another line. For this to work, calls must be made/received while on VoLTE. If you have data active on one line, and the other line doesn't have cellular service and the provider supports VoLTE, service will function using the active data on the other line. Essentially, it's like having Wi-Fi Calling, but it uses the data of one of the lines. Screenshot here: https://imgur.com/a/7UBR7vE Changes to existing features iMessage and FaceTime now supports two phone numbers, and you can start and iMessage conversation or FaceTime call with either number.