iPhone 6S and iPhone 6S Plus are getting out of stock as soon as they hit the shelves, but iOS 9 upgrade is not that lucky to have a good start.
There were initial download failures and upgrade issues because of bugs, prompting Apple to release iOS 9.0.1 to address these bugs. Most recently, Apple admitted another problem with the iOS 9 which affects the iCloud.
According to Forbes, Apple said, "App slicing is currently unavailable for iOS 9 apps due to an issue affecting iCloud backups created from iOS 9 where some apps from the App Store would only restore to the same model of iOS device."
Apple explained that instead of the variant specific for the customer's device type, the iOS 9 app downloads the Universal version.
If you're not happy with the upgrade to iOS 9 or you just want to wait until all bugs have been fixed, iDigitalTimes has shared easy steps to downgrade to iOS 8.4.1:
1. Back up your device data and settings so you don't lose them when you downgrade. There are two ways to back up. First is via transferring them to your computer. Plug in your device to a computer, open iTunes, and click Back Up Now on the device page. The second option is via iCloud. Go to Settings, iCloud, and tap the toggle button to turn on Backup. Ensure that you have enough space for all your data. Apple provides 5GB of free storage only.
2. Download the iOS 8.4.1 IPWS file that corresponds to your device model.
3. Plug in your iPhone to your computer, open iTunes, and go to the device page. Press Option/Alt on your keyboard (for Mac OS X) or Shift key (for Windows), then at the same time click Restore iPhone.
4. When the explorer box popped up, select the iOS 8.4.1 IPWS file you've downloaded then click Open to start the installation process.
5. When iOS 8.4.1 has been installed, iTunes will prompt you to restore backup. Click Yes to have your data and settings back.
