Apple-iOS9
For users of the newly released but unstable iOS 9 beta version, there is a tutorial that demonstrates how to downgrade from iOS 9 beta to iOS 8.3 Apple

Apple unveiled iOS 9, the upcoming version of its mobile operating system, at the annual Worldwide Developers Conference in San Francisco on Monday. The latest firmware, which includes a number of new features and improvements, will be compatible with the same devices as iOS 8 as well as devices powered by the A5 processor or newer.

The all new iOS 9 comes with an improved and more proactive Siri, split-screen multitasking for the iPad, public transit directions in Maps, a new News app and other new features. Shortly after the unveiling, Apple also seeded the first beta of iOS 9 for registered developers, who can log in to the company’s Developer Center to access the beta version as well as the release note and other information. Apple will release iOS 9 in the fall.

For anyone willing to enroll for Apple’s developer program for $99 a year, iOS 9 is available for download from the company immediately. However, it is still only a beta release, which means it is more useful for developers than regular users, and likely contains software bugs.

Here are some points to know before downloading and installing iOS 9 beta 1:

  • Users must back-up their devices using the latest version of iTunes or through iCloud before installing iOS 9 beta 1.
  • To download iOS 9 beta 1, the iPhone or iPad’s UDID must be registered with IMZDL, a popular source for iOS and OS X betas.
  • Users also will need to know their device’s identifier. For instance, an iPhone on the AT&T network uses the identifier A1428, while a Verizon iPhone uses the identifier A1429.

Note: iOS betas are intended for developers only. Attempting to install this version of iOS could put your device in an unusable state, which could necessitate an out-of-warranty repair. Users should proceed at their own risk.

How To Install iOS 9 Beta 1

Step 1: Download the iOS 9 beta 1 file for your specific iPhone or iPad model from Apple. Developers will need to log in to Member Center with their Apple ID user name and password to access the beta release. After that, the file should show up on IMZDL.

Step 2: Now, open iTunes and connect your iOS device.

Step 3: Choose “Restore your iPhone” with the iOS 9 beta 1. On Macs, hold down Alt/Option when clicking “Restore.” Windows users need to hold the Shift key when clicking “Restore.”

Step 4: Check your “Downloads” folder for the iOS 8 beta 1 installation file, which ends with “.ipsw.” The iOS 9 beta 1 installation may take some time to complete.

Step 5: You will get a “Slide to upgrade” slider after the device reboots. Swipe on the slider to proceed.

[Source: iPhone Hacks]

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