Apple Stops Signing iOS 16.3.1 to Prevent Downgrading
Following the release of iOS 16.4.1 today, Apple has stopped signing iOS 16.3.1, preventing iPhone users from downgrading to that software version. iOS 16.4, iOS 16.4.1, and the iOS 16.5 beta remain signed at the time of writing.

iOS 16.3.1 was released on February 13 and was a minor update with bug fixes, security improvements, and additional Crash Detection optimizations for iPhone 14 models. Apple routinely stops signing older iOS releases over time in order to prevent users from downgrading to an outdated software version.
iOS 16.4 will likely be unsigned later this month, so iPhone users who wish to downgrade to that version have limited time remaining to do so.
Popular Stories
Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. Nearly a year later, CarPlay Ultra is still limited to Aston Martin's latest luxury vehicles, but that should change fairly soon.
In May 2025, Apple said many other vehicle brands planned to offer CarPlay Ultra, including Hyundai, Kia, and Genesis.
CarPlay Ultra...
April and May have been relatively slow months for Apple this year, but there is a lot to look forward to heading into WWDC 2026 and beyond.
Apple is expected to release at least 15 more products later this year, with some of them held up until the more personalized version of Siri launches.
Beyond the usual annual updates to iPhones and Apple Watches in September, Apple's all-new smart...
Apple's first OLED MacBook Pro models have cleared a major manufacturing hurdle, with panel supplier Samsung Display having reportedly achieved yields above 90 percent on its Gen 8.6 OLED production line.
According to Korean publication The Elec, some individual process stages are now reaching yields as high as 95 percent, a level that the display industry considers "golden yield" territory ...