Apple has released the first iOS 27 release candidate (RC) for testing, bringing the next major iPhone software update closer to public launch. The RC is available to developers via Settings > General > Software Update, and those on the beta can install it directly.

The highlight of iOS 27 is Siri AI, featuring more conversational responses, personal context, on-screen awareness, and expanded actions. A dedicated Siri app allows users to revisit past conversations, with a new interface centered on the Dynamic Island. Siri in Camera brings Visual Intelligence.

Beyond Siri, AI features are integrated across Photos, Safari, Mail, Messages, and Shortcuts. iOS 27 also builds on last year's Liquid Glass redesign, adding a transparency slider, keywords and star ratings in Photos, customizable slideshows, Dual Capture in FaceTime, custom EQ for AirPods, and easier card switching in Apple Pay.

Performance improvements target app launches, Photos loading, AirDrop transfers, and Wi-Fi/cellular switching. The article will be updated with any notable changes found in the RC, and readers are encouraged to comment on new discoveries.