No iPhones do not have a dual sim card slot. Rather, the company uses the concept of eSim in order to allow its users to use multiple SIM. In this system, you can add an additional plan to your device via the QR code system and confirmation code, but you can only activate one line at a time.Only Chinese versions of the new iPhones have two sim slots for adding two physical nano sim cards. They released in the rest of the world only have one sim slot and the capacity to add an embedded e-sim. This feature will only get enabled by the Apple iOS software update.