This wikiHow teaches you how to use iTunes to install an older iOS version on your iPhone to your computer.
Step 1. Check your current iOS version
You can see which version of iOS you are currently using by going to General to go in Institutions from your iPhone and tapping About. This menu shows your current iOS version next to Version.
Step 2. Back up your iPhone
To go back to an earlier iOS version, you need to restore your iPhone. Backing up your device ensures that you don't lose any data, such as your photos, contacts, and installed apps.
If you don't know how to back up your iPhone, this article can explain how to do a complete backup using iCloud or iTunes
Step 3. Search Google for an IPSW file
You need an iPhone software file (IPSW) to manually install iOS software on your iPhone. Make sure to include your device model and iOS version you're looking for in your Google search. For example, if you want to install iOS 10.2 on your iPhone 6S, search for "IPSW iOS 10.2 iPhone 6S".
You can also go to IPSW.me to find the file you are looking for. This website has an up-to-date archive of IPSW files for older iOS versions
Step 4. Download an IPSW file to your computer
This file is only used for iOS installation. You can remove it from your computer after you finish installing your iOS.
- IPSW files for older iOS versions are usually Not signed. This means that the file is no longer authorized by Apple. If you're trying to install an Unsigned IPSW on your iPhone, you'll need to jailbreak your device first. If you need help jailbreaking, this article will walk you through the process.
Step 5. Open iTunes on your computer
You can use iTunes to manually install an IPSW file on your iPhone.
Step 6. Connect your iPhone to your computer
Use your USB cable to connect.
Step 7. Click on the iPhone icon
This button is below the play button in the top-left corner of iTunes.
Step 8. Click Summary on the left navigation menu
This is at the top of the menu under Settings.
Step 9. Click on Restore iPhone
- On a Mac, press and hold Option on your keyboard, then click Restore iPhone.
- On a PC, hold down the alt=""Image" key on your keyboard and click Restore iPhone.</li" />
Step 10. Select the IPSW file you want to install
Locate the IPSW file you just downloaded and click on it to select it.
Step 11. Click Open
iTunes will now open the IPSW file and start the installation process for your iPhone.
Step 12. Click on Restore
iTunes will remove the current software from your iPhone and replace it with the IPSW file you just downloaded. If you install an IPSW file for iOS 10.2, your iPhone will now run iOS 10.2.