How to Downgrade from iOS 9: Get Back from iOS 9.1 to 9.0.2
Is it possible to downgrade iOS 9.1 to 9.0.2 on your iPhone, iPod touch or iPad? This is possible for as long as Apple continues to sign version 9.0.2. The Cupertino-based company stops signing the previous operating system it releases for the iDevices soon after the new update arrives.
For example, if you already installed 9.1 version [you can download direct ipsw file of iOS 9.1 for your phone, tablet or update via OTA] and don’t like it you have time to return to the previous release.
How to Downgrade iOS 9.1 to iOS 9 [9.0.2]
Step 1. Firstly, you have to make sure you still have time to perform this simple procedure. There is one useful website that shows the signing status of iOS 9.0.2 and other firmwares and is updated daily: https://ipsw.me/9.0.2.
Step 2. If the checkmark is green you can proceed.
Step 3. Remember to backup no matter what you do. It is an important step for any manipulation you are planning to do with your iPhone, iPad or iPod touch.
Step 4. Unfortunately you can only get back to iOS 9.0.2 version. It is impossible to downgrade iOS 9.1 to 9 or downgrade iOS 9.1 to 9.0.1 firmware.
Step 5. You are doing everything at your personal risk. If the checkmark is still green you can download iOS 9.0.2 ipsw file if you don’t have it on your computer. Use direct download links for 9.0.2 iPhone, iPad or iPod touch version you have.
Step 6. Launch iTunes on computer.
Step 7. Enter the DFU state on iDevice: connect to Mac / PC and hold Power or Sleep / Wake button to swipe the device off. Keep holding the Power option for about 3 seconds. Don’t release the Sleep / Power button and start pressing on Home button for about 10 seconds. Let go off the Power option but still press on the Home button. You will get the message from iTunes that you device is detected in Recovery mode.
Step 8. Press on OK.
Step 9. Windows users should press Shift + Restore on iTunes and Mac users should click on Alt / Option + Restore in iTunes.
Step 10. Point to your 9.0.2 ipsw file.
Step 11. Choose Restore and Update.
Step 12. Continue by pressing Next, Agree and wait for iTunes to download the iOS 9.0.2 and restore your iPhone to this previous firmware version.
Step 13. Set up your iPhone.
Step 14. Remember to restore your information and restore from backup.
Start using iOS 9.0.2.