Apple iOS 26.4.2 New iPhone Software: Should You Upgrade?

InnovationConsumer TechApple iOS 26.4.2 New iPhone Software: Should You Upgrade?ByDavid Phelan,Senior Contributor.Forbes contributors publish independent expert analyses and insights. I write about lifestyle techFollow AuthorApr 23, 2026, 05:15pm EDTApple iPhone 17 Pro MaxGetty ImagesAnother iPhone update has been released just two weeks after the last one. But unlike iOS 26.4.1, the new version is all about one security fix. Here’s all you need to know and whether you should update to it or not.ForbesApple iPhone 18 Pro: Latest Leak Doubles Down On Design Update NewsBy David PhelanThis post has the initial thoughts on the new release and I’ll be updating this post over the coming week and I’ll add final thoughts on Thursday, April 30.Who Is It For And How Do You Get It?This is just the same as other iOS 26 updates, that is, it’s for all phones from the iPhone 11 and more recent. The latest models, including the iPhone 17 series, iPhone 17e and iPhone Air, are all covered by iOS 26.4.1. It’s also been released for those users who haven’t updated to iOS 26 in the form of iOS 18.7.8.It’s simple to install: go to the Settings app on the iPhone, choose General, then Software Update. Next, select Download and Install, and the software will download from there. This download was reasonably small, around 770MB on my iPhone 17 Pro Max.MORE FOR YOUWhat It’s AboutThere’s just one element here, and it’s about fixing an issue where notifications that you previously deleted remained on-device. It’s a security fix, in other words. Apple iOS 26.4.2 SecurityThe background to the issue is that recently the FBI accessed message notification content from Signal even after the app had been deleted. Let’s be clear, this is a serious issue, though it’s also true that for almost all of us, this would never have been a problem unless we’d fallen foul of the FBI. Dear reader, please don’t. But it’s now been fixed. if (!window.cnxel) { window.cnxel = {}; window.cnxel.cmd = []; var iframe = d...