If you have decided you’d like to update an i Phone or i Pad to i OS 9, you can install i OS 9.0.1 manually using firmware and i Tunes.
The manual firmware method is more advanced, making it perhaps best for specific reasons, like to resolve the frustratingly unresponsive “Slide to Upgrade” screen, to fix the Software Update Failed error, due to storage space limitations on the target device, because sometimes it’s just easier due to bandwidth constraints, or because you’re updating multiple of the same devices.
For starters, backing up your i Phone, i Pad, or i Pod touch is basically an all or nothing affair.
The first backup method is handled by i Tunes each time your i Phone is connected to your computer through USB.Otherwise, newer i Phones will automatically back up through i Cloud if that feature has been enabled, and those i Cloud backups happen anytime the device has been plugged into a power source and is on wi-fi.While the automatic backups are extremely useful and you should always use at least one of them, be it i Tunes or i Cloud, you can also initiate an instant backup of an i Phone manually.These self-started backups can be made from either i Tunes or i Cloud very easily, here is how to do either.Using Recovery Mode (i Phone 7)Using Recovery Mode (i Phone 6S and Older)Using Cydia on a Jailbroken i Phone Community Q&A This wiki How teaches you how to restore a previous backup on your i Phone without updating it to the latest version of i OS in the process.
Jailbreaking i OS 10 - 10.2.1Jailbreaking i OS 9 - 9.3.3Bypassing a Password with a Factory Reset Community Q&A This wiki How teaches you how to jailbreak your i Phone and use a factory reset to bypass a forgotten passcode.
Rei Boot and Rei Boot (Mac) enables you to fix i OS freeze, i Phone crashed during i OS 10/9 update, Recovery Mode stuck, DFU stuck, red i Tunes logo stuck, etc. Then Rei Boot will automatically detect the condition of your i Phone.
You can either click "Enter Recovery Mode", "Exit Recovery Mode" or use both according to the detecting result to reboot your i Phone.
Whatever the case, we’ll walk you through the entire process.
Note that you can use i OS 9.0.1, or i OS 9.0 and then update to i OS 9.0.1 after installation is complete.
Backing up an i Phone is important because it allows you to recover all of your personal data, apps, and stuff, if you ever need to restore the i Phone, upgrade it, or replace it with a new phone, all of which is done by restoring from the backups that are made.