Inconsistent results have been shown when testing Face ID on identical twins, with some tests showing the system managing to separate the two, [90] while other tests have failed. [91] iPhone X is the best made by Samsung". ZDNet. November 6, 2017. Archived from the original on April 20, 2021 . Retrieved June 27, 2021.

On the front of the phone, a 7-megapixel True Depth camera has an f/2.2 aperture, [54] and features face detection and HDR. It can capture 1080p video at 30 frames per second, 720p video at 240 frames per second, [53] and exclusively allows for the use of Animoji; animated emojis placed on top of the user's face that intelligently react to the user's facial expressions. [61] [62] Mono audioClover, Juli (December 5, 2017). "Consumer Reports Ranks iPhone X Below iPhone 8 Because of Durability and Battery Life". MacRumors. Archived from the original on December 8, 2017 . Retrieved December 8, 2017. Barometer, Motion Sensor, Proximity Sensor, Light Sensor, Gyroscope Sensor, Accelerometer (G-Sensor), Infrared Sensor In November 2017, iPhone X users reported on Reddit that the device's screen would become unresponsive after experiencing rapid temperature drops. [107] [108] Apple released the iOS 11.1.2 update on November 16, 2017, fixing the issue. [109] [110]

Gartenberg, Chaim (November 16, 2017). "Apple's latest iOS update fixes iPhone X screen responsiveness in cold weather". The Verge. Vox Media. Archived from the original on November 19, 2017 . Retrieved December 4, 2017.Sony Xperia S review: NXT of kin". GSMArena.com. p.6. Archived from the original on 2022-04-12 . Retrieved 2020-11-16.