Core Points - Apple has released iOS 18.4, which includes 13 major updates for iPhone users [1] - The most notable feature is the support for 5G-A / 5.5G networks, which has generated significant discussion on social media [2][3] - The update is compatible with iPhone 13 and later models, but user experiences with 5G-A have been mixed due to limited carrier coverage [4] Group 1: Key Features - iOS 18.4 introduces 8 new emojis and a new Sketch Style option in Image Playground [1] - Users can now customize their Photos app organization, including sorting by media type and modification date [8] - The update allows users to set a default translation app in the settings [7] Group 2: Additional Updates - The App Store now supports pausing and resuming app downloads directly [10] - New system languages have been added, including Bengali and Gujarati [12] - AirPods Max now supports 24-bit, 48kHz lossless audio with the purchase of a specific audio cable [14] Group 3: Limitations and User Feedback - Some features, such as Apple Intelligence and related AI functionalities, are not supported on the Chinese version of iPhones [6][16] - Users have expressed that while 5G-A is supported, the practical experience may not differ significantly from 5G due to signal stability issues [2][4] - For iPhone models below the 13 series, upgrading to iOS 18.4 may not be necessary unless users desire a smoother experience [18]