The iPhone 14 models that are sold in the United States don’t have a physical SIM card tray anymore; instead, they rely on eSIM technology, which was unveiled by Apple at the “Far out” event on Sept. 7th.

According to technical specifications on Apple’s website, the iPhone 14, iPhone 14 Plus, iPhone 14 Pro, and iPhone 14 Pro Max do not support physical SIM cards and instead feature dual eSIM, allowing the activation of multiple cellular plans on a single device.

Users can activate a cellular plan using an eSIM, or electronic SIM, instead of a physical nano-SIM card. The availability of eSIM is expanding rapidly, but the technology is still not universal, which explains why iPhone 14 models will continue to be sold outside of the United States with a SIM card tray for the time being.

A list of carriers that worldwide support eSIM technology can be seen on the Apple website. This covers several carriers in the United States, such as AT&T, T-Mobile, US Cellular, Verizon, Xfinity Mobile, Boost Mobile, H2O Wireless, Straight Talk, and C Spire.

All four of the new iPhone 14 models—the 6.1-inch iPhone 14, 6.7-inch iPhone 14 Plus, 6.1-inch iPhone 14 Pro, and 6.7-inch iPhone 14 Pro Max—are up for pre-order starting this Friday, September 9, and will start shipping to customers on September 16, 2022.