Mostly notably, the iPhone X includes a nearly bezel-less OLED display with 1125×2436 resolution (compared to a 1080×1920 LCD on 2016’s iPhone 7 Plus). That enables the iPhone X to have a larger 5.8-inch screen (compared to the 5.5-inch iPhone 7 Plus) while having a smaller form factor that is actually closer in size to the iPhone 7 with its 4.7-inch screen.
But, the thin bezels also cause the iPhone X to lose its home button and its fingerprint scanner. As a result, Apple is replacing Touch ID with Face ID, which will create a 3D map of your face and use that to unlock the device. The challenge—judging by the face-scanning software of the past from Google and others—is that it may not be as fast and accurate as a fingerprint scanner.
There’s also a natural security concern about Face ID being spoofed, but Apple says its new “True-Depth Camera System” takes a 3D mathematical model of your face and that it cannot be faked out by photos or even prosthetic masks.
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