Go back to Settings Software Update and then tap Install Now to install the now downloaded i OS update file.
If you’re not getting the i OS 9 software update via over-the-air (OTA) as mentioned above, then you can download the i OS 9 software update from the official download links provided below and use i Tunes to manually update your i OS device.
i OS will automatically check for available updates and will inform you that i OS 9 software update is available.
Note: Jailbreakers should install the update using i Tunes, as OTA updates are known to give problems while jailbreaking. Wait for the download to complete and then tap Install to apply the update.
(Note that if you choose to encrypt your backup using i Tunes, along with normal data, secure information like passwords etc.
are also backed up.) You can back up your i OS device using i Tunes or i Cloud.
Usage of Tiny Umbrella (Fix Recovery) is fairly simple.
Just download stock i OS 4.3 IPSW for i Phone 4 from here and Tiny Umbrella from here (Win | Mac).
Once TSS Server is started, restore stock i OS 4.3 IPSW with with i Tunes.For those who don't know, upgrading to i OS 4.3 using Tiny Umbrella or Saurik server leaves you in infinite recovery mode loop.This is due to an extra baseband protection introduced by Apple after i OS 4.2.1 to discourage people from upgrading to newer firmwares while preserving their basebands.When you get 1013 error, use Tiny Umbrella (Fix Recovery) to kick your i Device out of recovery mode loop.Tutorial: Update i Phone 4 to i OS 4.3 while Preserving Baseband [How-To Guide]Update#1: Some users reported that they are unable to use Tiny Umbrella (Fix Recovery) for i OS 4.3 because of some missing zlib1error.Before you start the download, plug in your device so the battery doesn’t drain during the update process.It can take anywhere from a few mins to an hour for the update to download and install, depending on how Apple’s servers are handling the load and your internet connection.Step 4: You will get a popup message informing you the new update is available. If it says i OS 9 is the latest version then download the appropriate firmware file using download links provided in step 5.Step 5: Skip this step if you i OS 9 was available in Step 3 and 4.i OS 9 includes new features such as Proactive Assistant, transit directions in Maps, enhanced multitasking features for the i Pad, and lots more.It is always a good idea to take a backup of your i Phone, i Pad and i Pod Touch before updating it with the latest i OS software update.