Apple device users who are experiencing issues with the latest iOS 8.4.1 operating system no longer have the option of downgrading their device. Apple has officially closed the window on iOS 8.4.

It has been reported that iOS users experienced a number of issues who have upgraded their iPhone, iPad, or iPod touch to iOS 8.4.1The latest update was actually designed to fix several problems and bugs, especially those related to use of the company's new Apple Music streaming service. For many users, however, the update brought additional bugs and problems, not only with Apple Music, but other important performance functions.

The most prevalent issue experienced by users is severe battery drain. Other iOS 8.4.1 problems include lack of Wi-Fi, issues with Bluetooth connectivity, and device freezing.

One popular solution among users experiencing one or more of these issues was simply to ditch the latest iOS update and revert back to iOS 8.4. Unfortunately for those who are having issues and would still like to downgrade, it is now too late. Apple has officially stopped signing iOS 8.4, meaning that it is no longer possible to downgrade a device via the restore function in iTunes.

Whenever Apple releases a new version of its OS, it allows a small window of opportunity for those who, for whatever reason, would like to revert back to the prior OS. The window is usually kept open for a couple of weeks, and then closes.

The good news is that the release of iOS 9 is quickly approaching. While iOS 8.4.1 was a relatively small and incremental update, iOS 9 is a major OS upgrade, and will hopefully address and eliminate all of the issues and problems being experienced by those who upgraded to iOS 8.4.1. iOS 9 is expected to be released in September alongside Apple's next-generation smartphones, the iPhone 6s and iPhone 6s Plus.