Apple's software engineers are testing iOS 26.3.1, according to MacRumors visitor logs, signaling a minor update to fix bugs and security vulnerabilities. The update should arrive within the next two weeks, serving as a stopgap between iOS 26.3 and the more significant iOS 26.4.

Last month, Apple released iOS 26.2.1 with bug fixes and support for the second-generation AirTag. The timing suggests iOS 26.3.1 could add compatibility for new products Apple plans to announce during a three-day event from March 2-4, potentially including the iPhone 17e. Selected journalists will receive hands-on time with new devices at an "Apple Experience" in New York, London, and Shanghai on March 4.

While iOS 26.3.1 will be a minor update, iOS 26.4 is shaping up to be more substantial, adding new features across Apple Music, Apple Podcasts, and CarPlay. The update notably lacks the personalized version of Siri that many users have been anticipating. As Apple prepares for its major product announcements, this incremental update ensures existing devices remain stable while the company rolls out its next generation of hardware and software.