|CPU||Hexa-core 2.39 GHz (2x Monsoon + 4x Mistral)|
|GPU||Apple GPU (three-core graphics)|
|OS||iOS 11.1.1, upgradable to iOS 11.2.5|
|Chipset||Apple A11 Bionic|
The iPhone X received mixed to positive reviews. Its display and build quality were universally praised, and the camera also scored positively on tests. The phone received particularly polarized reception due to the sensor housing "notch" at the top of the screen and the introduction of an all-new authentication method. The notch was heavily mocked by users on social media, although app developers responded either neutrally or positively to the changes it brought to the user experience in their apps and games. Reviewers had mixed reactions, with some condemning it and others acknowledging it as unusual in the first moments of use before getting accustomed to its presence. Face ID facial recognition was praised for its simple setup, but criticized for requiring direct eyes on the screen, though that option can be disabled within the systems preferences.
Additionally, Face ID has sparked a debate about security and privacy. Apple claims it is significantly more advanced than Touch ID, having far less false positives, though media reports have discussed the fact that Face ID and other biometric unlocking systems do not have the same level of constitutional privacy as a passcode in the United States. Face ID has shown mixed results when trying to separate identical twins, and the promise of enhanced security has been challenged by hackers and mask makers trying to infiltrate it; at least one of such attempts has been successful, though difficult to perform. Third-party app developers can also request access to "rough maps" of user facial data for their apps, causing concerns among privacy advocates despite rigid requirements by Apple of how developers handle facial data.