One week after releasing iOS 26 developer beta, Apple has today released iOS 18.6 beta for testing. The update has been released for all iOS 18-supported devices and can be downloaded on any iPhone that is signed in with an Apple Developer account.
Alongside iOS 18.6 and iPadOS 18.6 betas, Apple has also released macOS 15.6, watchOS 11.6, tvOS 18.6, and visionOS 2.6 developer beta.
No new features and noticeable changes are expected in iOS 18.6, and the update will most likely bring bug fixes and performance enhancements for all devices, including specific iPhone models that are not supported by iOS 26.
If you are interested in testing out the iOS 18.6 beta, then you can head over to Settings -> Software Update -> Beta Updates and select iOS 18.6 Developer Beta. Then return to the Software Update page and download the new beta.