Now that iOS 10 has been released in beta format, we can see just how popular it is by the steadily rising adoption rate by developers and other users who want to test out the latest firmware from Apple. However, while most are enjoying the experience, there are those who are find that there are just too many bugs in the latest beta and want to get rid of it, downgrade back to iOS 9. Other users are being stopped from upgrading to iOS 10 beta 2 by an Activation Error. This is easily fixed in one of two ways – installing using a different method or downgrading. Luckily, because iOS 10 is only in beta format, Apple is still signing the previous firmware and downgrading is easy using iTunes.
Image : iOS 10 Activation Error on iTunes
Downgrade from iOS 10 :
Provided the version of the iOS that you want to downgrade to is still being signed by Apple, the process is easy. Keep in mind though, if you made a backup of your iOS device while you were on iOS 10 beta 2, once you have downgraded you will not be able to access that backup.
- Check that you are on the latest iTunes version – if not, update before you go any further
- Download the right IPSW for the iOS version you want to downgrade to and for the device you are using.
- Disable Find my iPhone | Find my iPad by opening Settings > iCloud > Find my iPhone | iPad and disabling it – you can switch it back on after the downgrade
- Plug your iOS device into your computer and open iTunes
- Your iOS device must now be placed into DFU mode – hold down the Power and Home buttons simultaneously for 10 seconds. Release the Power button but continue to hold the Home button down until the Device in Recovery message appears in iTunes.
- Now press SHIFT or ALT [ Windows or Mac ] on your keyboard and click Restore in iTunes
- Find the IPSW you downloaded earlier and click on it
- iTunes will downgrade your iOS device to your chosen firmware.
- Your iOS device will reboot to the Hello screen when the downgrade is complete
Register Your UDID :
The only other way to stop the activation error is to try installing iOS 10 beta 2 using a different method and that requires you to register the UDID number of your iOS device. First, find your UDID number:
- Make sure your iOS device is connected to your computer
- Open iTunes
- Click on Device Summary for your device
- Click on Settings
- Highlight and right-click the UDID number and copy it
After you have done that, you have two ways to register your UDID:
Join the Apple Developer Program :
- Visit this link – Apple Developers Program [ext link]
- Sign up for the Developers program and make your payment – this will cost you $99 per year
- Now go to the Developer Center and log in with your Apple ID
- Register the UDID number of your device
- Go to the Developer Portal and download the relevant IPSW
- Extract the files to your desktop and then install, using the steps for downgrading above
Other Useful Links :