If you're buying a new iPhone 16 model in the US, it'll come without a SIM card tray, and you'll need to switch to an eSIM – as is the new Apple norm. The latest best iPhone doesn't come with a SIM card tray, but that isn't the case anywhere else. Removing the SIM card tray also makes manufacturing the iPhone easier for Apple, saving time and money, and it's one less port for water and dust ingress, keeping your iPhone's internals safer and sounder.