About a week after Apple released the iOS 8.4 update for its iDevices, the company has  blocked signing for the iOS 8.3 firmware.

According to Apple Insider, from now on the iPhone, iPad and iPod Touch will no longer support signing to iOS 8.3, so users who have updated to iOS 8.4 will not be able to downgrade to iOS 8.3. “Signing” is Apple’s way of communication with its different products and services such as iTunes, iPhones and iPads that a particular iOS update is the latest version.

By blocking iOS 8.3 signing, Apple wants to convey to users that this version of iOS has expired. It may also want to tell the audience that the iOS 8.4 is a stable update. Moreover, it wants to push its users to try the latest features available on the iOS 8.4, such as the Apple Music and the improved Music app.

Apple Insider has further reported that the Cupertino, California-based firm is focusing its efforts on its new live streaming music service Apple Music. It is marketing Apple Music within the Music app on iDevices and also through television ads.

Apple Music is available for free for a three-momth trial period. trial purpose. After the  trial period, users will have to pay $9.99 per month for individuals or  $14.99 per month for a family subscription.

Just after the release of iOS 8.4 update, the Chinese jailbreak group called TaIG rolled out its new jailbreak tool v2.1 for jailbreaking iOS 8.4 on iPhone, iPad and iPod Touch. The jailbreaking can be carried out by connecting the iDevice to the Windows PC and running the TaiG jailbreak tool.

TaiG has not released an exclusive jailbreak tool for Mac OS X users. In order to jailbreak iOS 8.4 on Mac PCs, users will have to install a Windows virtual machine on it and then carry out the iOS 8.4 jailbreak.