iOS 26 public beta 4 is here: Everything to know about Apple's big software changes coming to iPhone and iPad

Here is a 200-word summary of the key points from the news article: Apple has released the fourth public beta of iOS 26, the next major update coming to iPhones and iPads later this year. The update introduces a significant visual overhaul called "Liquid Glass," which will bring a new translucent design across Apple's operating systems. Other notable iOS 26 features include: - Phone app redesign with integrated contacts, calls, and voicemail - Live translation in Phone, FaceTime, and Messages apps - Polls in group chats - Filtering of unknown senders in Messages - "Visual Intelligence" for searching screenshots - Return of the Photos app's tabs iPadOS 26 is also getting major updates, including true multitasking with resizable app windows and a new menu bar. The update will be compatible with iPhones released in 2019 or later, as well as the latest iPad models. Apple is expected to release the final version of iOS 26 alongside the new iPhone 17 lineup in September. The public beta is now available to download for those enrolled in Apple's Beta Software Program. However, it's recommended to use a secondary device, as beta software can be unstable.