How to install iOS 9 update using iTunes:
If you’re not getting the iOS 9 software update via over-the-air (OTA) as mentioned above, then you can download the iOS 9 software update from the official download links provided below and use iTunes to manually update your iOS device. You may also need to install the update using iTunes if you don’t have enough storage space on your device for the OTA update.
Before you plug in your iOS device. take a moment to make sure you are using the latest version of iTunes. Click on iTunes in the menu bar and then click on “Check for updates.”
Once iTunes is all squared away, it’s time to turn your attention to your iOS device and follow these instructions:
Connect your iOS device to your computer using an USB cable. Wait for iTunes to open and connect to your device.
Click on device button to the left of the iTunes Store button in the top right corner in iTunes.
Click on the “Check for Update” directly without using holding down on the Option key or the Shift key. If the iOS 9 update is available it will automatically download and update your device to iOS 9.Step 4: You will get a popup message informing you the new update is available. Click on Download and Update button. If it says iOS 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 iOS 9 was available in Step 3 and 4.
Download the firmware file for your device from our download page for the respective devices [Note the download file is around 2.0 GB depending on your device]:
Note: If you’re downloading the firmware file using Safari then ensure that auto unzip feature is disabled or use Chrome or Firefox.
You can check your iPhone, iPad or iPod touch’s back cover for the model number to download the appropriate download link.
Download links for iOS 9 IPSW file for iPhone:
iPhone 6 Plus
iPhone 5s (Model A1453, A1533)
iPhone 5s (Model A1457, A1518, A1528, A1530)
iPhone 5c (Model A1456, A1532)
iPhone 5c (Model A1507, A1516, A1526, A1529)
iPhone 5 (Model A1428)
iPhone 5 (Model A1429)
Download links for iOS 9 IPSW file for iPad
iPad Air 2 (Model A1566)
iPad Air 2 (Model A1567)
iPad mini 3 (Model A1599)
iPad mini 3 (Model A1600)
iPad mini 3 (Model A1601)
iPad Air (Model A1474)
iPad Air (Model A1475)
iPad Air (Model A1476)
iPad mini 2 (Model A1489)
iPad mini 2 (Model A1490)
iPad mini 2 (Model A1491)
iPad (4th generation Model A1458)
iPad (4th generation Model A1459)
iPad (4th generation Model A1460)
iPad mini (Model A1432)
iPad mini (Model A1454)
iPad mini (Model A1455)
iPad Wi-Fi (3rd generation)<
iPad Wi-Fi + Cellular (model for ATT)
iPad Wi-Fi + Cellular (model for Verizon)
iPad 2 Wi-Fi (Rev A)
iPad 2 Wi-Fi
iPad 2 Wi-Fi + 3G (GSM)
iPad 2 Wi-Fi + 3G (CDMA)
Download links for iOS 9 IPSW file for iPod touch
iPod touch (5th generation)
iPod touch (6th generation)