Apple has stopped signing three previous versions of its mobile Operating System (OS) iOS following the release of iOS 11. 2. 5 last week.
"For instance, prior to today, a user running iOS 11. 2. 5 would have been able to downgrade to either 11. 2, iOS 11. 2. 1, or iOS 11. 2. 2 through iTunes.
That downgrading window is now closed, " 9to5Mac reported late on Wednesday.
The iPhone maker has particularly stopped signing iOS 11. 2, iOS 11. 2. 1 and iOS 11. 2. 2 for all its devices.
It routinely stops signing older versions of software updates after new releases come out in order to encourage users to keep their operating systems up - to - date.
Apple rolled out iOS 11. 2. 5, with Siri enhancements, official support for the smart speaker HomePod and a host of bug fixes and performance improvements.
Coinciding with the public release of iOS 11. 2. 5, the Cupertino - based giant started beta testing iOS 11. 3, which includes features such as new Animoji, iMessages in the Cloud, AirPlay 2 including others.
"This spring, iOS 11. 3 will deliver exciting new ways to experience Augmented Reality on iPhone and iPad, new Animoji on iPhone X and the ability to view health records in the Health app, " Apple had said in a statement.
A major feature in the update will be to show battery health and recommend when a battery needs to be serviced.
Users can also see if the power management feature - - first introduced in iOS 10. 2. 1 - - is on and can choose to turn it off, the company said.
This feature is available for devices such as iPhone 6, iPhone 6 Plus, iPhone SE, iPhone 6s, iPhone 6s Plus, iPhone 7 and iPhone 7 Plus.
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