iOS 12

iOS 12
iOS 12
Version of the iOS operating system
	iOS 12 home screen on an iPhone XS Max
Developer	Apple
Source model	Closed-source with open source components
Initial release	September 17, 2018
Latest release	12.5.8 (January 26, 2026) [±]
Marketing target	Smartphones, tablets and digital media players
Update method	OTA updates, iTunes
Package manager	App Store
Kernel type	Hybrid (XNU)
License	Proprietary software with open-source components
Preceded by	iOS 11
Succeeded by	iOS 13 (iPhones and 7th generation iPod touch); iPadOS 13 (iPads);
Official website	iOS 12 - Apple at the Wayback Machine (archived September 9, 2019)
Tagline	More power to you.
Support status
	Obsolete Minimal 3rd-party app support.

iOS 12 is the twelfth major release of the iOS mobile operating system developed by Apple. Aesthetically similar to its predecessor, iOS 11, it focuses more on performance than on new features, quality improvements and security updates. Announced at the company's Worldwide Developers Conference on June 4, 2018, iOS 12 was released to the public on September 17, 2018. It was succeeded for the iPhone and iPod Touch by iOS 13 on September 19, 2019, and for the iPad by iPadOS 13 on September 24, 2019.

Security updates for iOS 12 continued for four years after the releases of iOS 13 and iPadOS 13 for devices unable to run the newer versions. The last update, version 12.5.8, was released on January 26, 2026 to extend a expiring certificate to allow iMessage, FaceTime, and device activation to work past 2027, notably over three years after the previous update (in 2023) and over seven years since the release of iOS 12. The signing thereof was paused by Apple after Telstra was made aware of an "issue preventing some older Apple devices from connecting to our network, including calls to 000", stating that they are currently "working on this as a priority with Apple". iOS 15.8.6, iOS 16.7.13, and iOS 18.7.4 were also allegedly affected. The issue was later resolved and the updates re-released.