iPhone X smartphone runs on the iOS 11.1, upgradable to iOS 15.1. It has 64GB storage and 3GB RAM.  It runs on the Apple A11 Bionic chipset.  It has a 5.8" screen-to-body ratio, Super Retina OLED, HDR10, Dolby Vision screen with  1125 x 2436 pixels pixels, 19.5:9 ratio