Incident: Face ID Failure on iPhone XS Max after iOS 12.1 Update

Published Date: 2018-11-15

Postmortem Analysis
Timeline 1. The software failure incident with Face ID not working for some iPhone X users happened around November 2018. [77576]
System 1. Face ID system on iPhone X, iPhone XS, iPhone XS Max, and iPhone XR [77576]
Responsible Organization 1. The software failure incident affecting Face ID on iPhone X users was caused by an apparent bug in the latest iOS 12.1 version upgrade [77576].
Impacted Organization 1. iPhone X users [77576] 2. iPhone XS Max users [77576]
Software Causes 1. The failure incident was caused by a mysterious bug in the new software that prevented some iPhone X users from activating Face ID on their handsets [77576]. 2. The issue was linked to the latest iOS 12.1 version upgrade, as reported by customers on social media [77576]. 3. The problem with Face ID not being available was associated with the 12.1 upgrade, with users reporting that the problem started after downloading the upgrade [77576].
Non-software Causes 1. Hardware malfunction leading to an iPhone X allegedly exploding during a software update installation [77576] 2. Face ID technology failure due to a hardware issue with the iPhone XS Max model [77576]
Impacts 1. Some iPhone X users were unable to activate Face ID on their handsets, leading to the need to enter their passcode manually [77576]. 2. Frustrated Apple users took to social media platforms like Twitter and Reddit to complain about the 'not available' message caused by the software bug [77576]. 3. The issue was linked to the latest iOS 12.1 version upgrade, affecting mainly the iPhone XS Max model [77576]. 4. Users reported that the problem started after downloading the 12.1 upgrade, indicating a direct impact of the software update [77576]. 5. The incident led to users having to perform a soft reset to potentially resolve the Face ID issue [77576].
Preventions 1. Ensuring thorough testing of the software update before releasing it to users could have potentially prevented the Face ID activation issue on iPhone X users [77576]. 2. Implementing a more robust quality assurance process to catch bugs and glitches in the software upgrade could have helped prevent the 'Face ID not available' problem [77576]. 3. Conducting more extensive user acceptance testing to identify and address any potential issues with the Face ID feature could have mitigated the software failure incident [77576].
Fixes 1. Performing a soft reset by pressing the Volume Up key, then releasing, pressing the Volume Down key, then releasing, and finally pressing and holding the Power button until the Apple logo appears on-screen. If Face ID is still not working, contacting Apple Support is recommended [77576].
References 1. Customers on social media [77576] 2. Reddit 3. Twitter 4. Apple support forums

Software Taxonomy of Faults

Category Option Rationale
Recurring one_organization (a) The software failure incident having happened again at one_organization: The article mentions a previous incident where facial ID technology failed around the same time last year due to the iOS 11.2 update, which was created to fix another bug in the Apple system that was causing some phones to constantly crash [77576]. (b) The software failure incident having happened again at multiple_organization: There is no specific mention in the provided article about the software failure incident happening at other organizations or with their products and services.
Phase (Design/Operation) design, operation (a) The software failure incident related to the design phase can be seen in the article [77576]. The issue with Face ID not being available for some iPhone X users was linked to the latest iOS 12.1 version upgrade. Users reported that the problem started after they downloaded the upgrade, indicating that the introduction of the new software version contributed to the failure. Additionally, the article mentions that last year, there were reports of Face ID technology not working due to the iOS 11.2 update, which was created to fix another bug in the Apple system that was causing phones to crash. (b) The software failure incident related to the operation phase can be observed in the same article [77576]. Users experiencing the Face ID issue had to resort to manually entering their passcode to unlock their devices, indicating a failure in the operation of the Face ID feature. Users suggested performing a soft reset or contacting Apple Support to resolve the issue, highlighting the operational challenges faced by users in utilizing the Face ID technology.
Boundary (Internal/External) within_system (a) The software failure incident related to the iPhone X Face ID issue is within_system. The problem with Face ID not being available for some users was linked to the latest iOS 12.1 version upgrade [77576]. Users reported that the issue started after they downloaded the upgrade, indicating that the problem originated from within the system itself. Additionally, the solution provided involved performing a soft reset on the device, further indicating that the issue was internal to the software system.
Nature (Human/Non-human) non-human_actions, human_actions (a) The software failure incident occurring due to non-human actions: - The article reports a mysterious bug affecting some iPhone X users, preventing them from activating Face ID on their handsets. This bug is linked to the latest iOS 12.1 version upgrade [77576]. - Users are experiencing a 'not available' message on their screens when trying to use Face ID, indicating a software issue introduced without human participation [77576]. (b) The software failure incident occurring due to human actions: - Users have reported the issue of Face ID not working after downloading the iOS 12.1 upgrade, suggesting a potential link between the upgrade and the problem [77576]. - Some users mentioned that the problem started after they downloaded the 12.1 upgrade, indicating that human actions, such as upgrading the software, may have contributed to the failure [77576].
Dimension (Hardware/Software) hardware, software (a) The software failure incident related to hardware: - An iPhone X allegedly "exploded" as a user was in the process of installing a software update, leading to the phone getting hot and exploding [77576]. (b) The software failure incident related to software: - An apparent problem with new software caused some iPhone X users to be unable to activate Face ID, leading to a 'not available' message on the screen. This issue was linked to the latest iOS 12.1 version upgrade [77576].
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident related to the iPhone X Face ID issue does not seem to be malicious. Users reported a mysterious bug causing Face ID to show a 'not available' message on the screen, which required manual passcode entry to unlock the device. The problem was linked to the iOS 12.1 upgrade, and users attempted to resolve it through methods like performing a soft reset. Additionally, there was a separate incident where an iPhone X allegedly "exploded" during a software update installation, but this was not attributed to malicious intent [77576]. (b) The software failure incident appears to be non-malicious in nature. Users experienced issues with Face ID functionality after the iOS 12.1 upgrade, leading to complaints on social media platforms like Twitter and Reddit. The problem was not intentional but rather a result of a bug in the software upgrade. Users attempted various troubleshooting steps to address the Face ID problem, indicating a non-malicious software failure incident [77576].
Intent (Poor/Accidental Decisions) poor_decisions (a) The software failure incident related to the iPhone X Face ID issue appears to be more aligned with poor_decisions. The problem with Face ID not being available for some users was linked to the latest iOS 12.1 version upgrade [77576]. This suggests that the failure was due to a decision made during the software upgrade process that introduced the bug causing Face ID to malfunction. Additionally, the incident highlights frustration among users who were affected by this issue, indicating a potential oversight or poor decision-making in the software development or testing phase.
Capability (Incompetence/Accidental) development_incompetence, accidental (a) The software failure incident related to development incompetence is evident in the article as some iPhone X users faced a problem with the new software, specifically the Face ID feature, after upgrading to the latest iOS 12.1 version. Users reported issues with Face ID not being available, requiring them to enter their passcode manually. This indicates a failure in the development process where the software update introduced a bug affecting the functionality of a critical feature like Face ID [77576]. (b) The accidental software failure incident is highlighted in the article where an iPhone X allegedly "exploded" while a user was in the process of installing a software update. The user, Rocky Mohamadali, posted pictures of the cracked and blackened phone after it overheated and exploded during the update process. This incident points to an accidental failure in the software or hardware that led to the phone malfunctioning and potentially causing harm to the user [77576].
Duration temporary (a) The software failure incident described in the articles seems to be temporary. Users reported issues with Face ID not working after a software update, specifically iOS 12.1. Some users mentioned that the problem started after they downloaded the upgrade, and one user even stated that the update to 12.1 fixed the issue in their case. Additionally, users were able to resolve the problem by performing a soft reset, indicating that the failure was not permanent [77576].
Behaviour crash, omission, value, other (a) crash: The software failure incident mentioned in Article 77576 is related to a crash. Some iPhone X users were unable to activate Face ID on their handsets, leading to a situation where they had to enter their passcode manually. This indicates a failure of the system losing its state and not performing its intended function of unlocking the device using Face ID [77576]. (b) omission: The software failure incident also involved an omission. Users reported receiving a 'not available' message on the screen when trying to use Face ID, indicating that the system omitted to perform its intended function of facial recognition for unlocking the device [77576]. (d) value: Additionally, the software failure incident can be categorized under the value type. Users experienced a situation where Face ID was not available, and they had to reset the feature or contact Apple Support to resolve the issue. This indicates a failure of the system performing its intended function of correctly identifying users for device unlocking [77576]. (f) other: The software failure incident also involved other behaviors. Users reported issues with Face ID after updating to iOS 12.1, suggesting a potential timing issue where the system performed its intended function but at the wrong time or after the update. Furthermore, there were reports of an iPhone X allegedly exploding during a software update, indicating an unexpected behavior not fitting into the defined categories [77576].

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence property, delay, non-human, other (a) death: People lost their lives due to the software failure - No information about any deaths related to the software failure incident was mentioned in the articles. [77576] (b) harm: People were physically harmed due to the software failure - There is no mention of physical harm to individuals due to the software failure incident. [77576] (c) basic: People's access to food or shelter was impacted because of the software failure - The software failure incident did not impact people's access to food or shelter. [77576] (d) property: People's material goods, money, or data was impacted due to the software failure - Users of iPhone X faced inconvenience and frustration as they were unable to activate Face ID due to a software bug, leading them to manually enter passcodes to unlock their devices. This could be seen as an impact on user experience and potentially on data security. [77576] (e) delay: People had to postpone an activity due to the software failure - Users had to deal with the inconvenience of not being able to use Face ID and having to resort to manual passcode entry due to the software bug. This could have caused delays in accessing their devices efficiently. [77576] (f) non-human: Non-human entities were impacted due to the software failure - The software failure incident affected the functionality of Face ID on iPhone X devices, which is a technology designed for user identification. [77576] (g) no_consequence: There were no real observed consequences of the software failure - The software failure incident led to users experiencing issues with Face ID functionality on their iPhone X devices, causing frustration and inconvenience. [77576] (h) theoretical_consequence: There were potential consequences discussed of the software failure that did not occur - The articles did not mention any potential consequences discussed that did not occur. [77576] (i) other: Was there consequence(s) of the software failure not described in the (a to h) options? What is the other consequence(s)? - The software failure incident resulted in users having to resort to performing soft resets or contacting Apple Support to resolve the Face ID issue on their iPhone X devices. This could be seen as an additional consequence of inconvenience and time spent troubleshooting the problem. [77576]
Domain information (a) The software failure incident reported in Article 77576 is related to the information industry. The incident involves a bug in the Face ID feature of the iPhone X, which is a technology aimed at safely identifying users to unlock smartphones [77576].

Sources

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