You can downgrade from the iOS 10 beta to iOS 9 fairly easily, but you need to take one special step during the restore process or your downgrade to iOS 9 will fail.
Using this guide you can downgrade from iOS 10 to iOS 9.3.3 from the developer iOS 10 beta and it should work later this year to downgrade from the public iOS 10 beta to iOS9.
The public iOS 10 beta is, like any beta, somewhat buggy on a variety of devices. It is one of the reasons that regular users should stay away from the iOS 10 beta until at later beta that is farther along in the development process.
Here’s what you need to know to downgrade from the iOS 10 beta to iOS 9 on iPhone, iPad or iPod Touch.
iOS 10 to iOS 9 Downgrade Prep
The process will erase your device, so make sure you have a backup from when you were on iOS 9. In the past you could not restore a backup made on a new iOS beta to a device running an older beta.
The next thing to do is to make sure that you have enough time to process this. The downgrade takes 10 to 30 minutes and then you will need to restore from iCloud or from an iTunes backup.
You don’t need to find an iOS 9.3.3 download for this to work. You will need your computer, iTunes and a Lightning cable so that you can connect to the computer.
How to Perform an iOS 10 Downgrade to iOS 9
The process of downgrading iOS 10 to iOS 9 is straightforward if you want to go to iOS 9.3.3, which is the current version of iOS.
This process erases your iPhone or iPad and while it is happening you cannot use the device for calls or any other feature.
To get started plug your iPhone in to your computer. This works with Mac or with Windows devices as long as you have iTunes installed.
With the iPhone or iPad connected press and hold the home button and the power button for 10 seconds.
After 10 seconds let go of the power button, but keep holding the home button. This will put the iPhone into DFU mode, which allows iTunes to restore to the current regular version of iOS.
When iTunes shows a pop up stating that the iPhone is in recovery mode and then you know that you are ready to downgrade to iOS 9. Once the recovery mode logo appears on the iPhone and the pop up on your computer you can let go of the home button, but do not unplug the iPhone.
In iTunes find the page that shows your iPhone, by clicking on the small device icon in the upper left, and then click on Restore iPhone.
For most users this is the last major step. iTunes should find the iOS 9.3.3 software and start the download for you. After this process completes the iPhone will restart and you can set it up on iOS 9.3.3 like a new phone. Part of this process will allow you to choose a restore option through iCloud or iTunes.
If you run into any problems here, you may need to perform a downgrade by downloading the iOS 9.3.3 ipsw file for their device. If you need to do this you will need to hold Option and click restore on Mac or Shift and click Restore on Windows. From here, find the ipsw file you downloaded and then click Open and Restore.
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