What are the key changes in Apple's WWDC 2025 software update?

Apple's WWDC 2025 introduced version unification, with all operating systems now labeled as version 26 instead of having separate numbering systems. The update features a new 'liquid glass' aesthetic that makes UI elements like icons, dialog boxes, and the lock screen more transparent. iOS 26 includes a redesigned, simplified camera app with hidden settings and new phone features like call screening and hold assist, similar to popular Pixel features. The update also integrates contacts, voicemail, and missed calls into one unified interface for improved user experience.