Apple ceases code signing for iOS 9.2.1 after successful iOS 9.3.1 release
Following the rollout of Apple’s latest iOS 9.3.1 point release, the company on Tuesday stopped signing code for iOS 9.2.1, meaning users can no longer downgrade to the older operating system version.
Apple routinely ceases code signing on deemed obsolete iterations of iOS in order to ensure a consistent user experience and to protect consumers against bugs or security vulnerabilities fixed with the most recent software.
When it pushed out iOS 9.3.1 last week, Apple patched a web link bug that in some cases caused apps to freeze or crash.
Prior to the release it was discovered that a bloated associations file in popular travel app Booking.com was to blame for a host of runtime failures affecting Safari, Mail and Messages, along with third-party web browsers. The data overflow was severe enough to necessitate a new version of iOS, as simply uninstalling the offending app was…
Read the entire article from AppleInsider here: Apple ceases code signing for iOS 9.2.1 after successful iOS 9.3.1 release