The iPhone 17 Slim won't have a SIM card tray because it is too thin to have one, and it probably won't have mmWave either.

Apple engineers are wrestling with where to put the SIM card, battery, and thermal materials in the rumored iPhone 17 “Slim,” according to The Information. Although US iPhones haven’t had SIM cards for a couple of years now,

Next year’s rumored iPhone 17 Slim could miss out on the telephoto camera lens, which could be a tough pill to swallow if it’s as expensive as rumored.

A new iPhone 17 Air's rumour indicates that the upcoming device is between 5 to 6mm thick, which is making it difficult to fit some parts, like SIM tray.