iOS 5 beta install: error 20 – how to solve
Some readers have reported seeing Error 20 when restoring with iOS 5 beta.
Mac Rumours has a discussion forum on this topic: Iphone 4 Error 20 When Restoring with ios5 Beta. It appears that this problem affects devices that have been upgraded to iOS 4.3.4 before the iOS 5 beta install.
The solution is to put the device into Recovery Mode before step 6 in the Guide to installing iOS 5 beta. Complete instructions on how to put your device in recovery mode are available in this Apple Support article: iPhone and iPod touch: Unable to update or restore.
Here is a summary of the steps:
- Turn off the iPhone/iPod Touch/iPad – hold the Sleep/Wake button (top right corner) for a few seconds until the red slider appears, and then slide the slider.
- Press the Home button and connect the USB cable to the iPhone/iPod Touch/iPad – the device should power on.
- Continue holding the Home button until you see the "Connect to iTunes" screen, then release the Home button:
- iTunes should show the "recovery mode" alert:
- Continue with Step 6 in the Guide to installing iOS 5 beta.
Additional notes
If you find that iTunes is not recognising your device after following the above instructions, please have a good read of Apple's Support article: iPhone and iPod touch: Unable to update or restore. It also includes a link for Windows users on what to do if iTunes can't see the iPhone, which has links to instructions such as restarting the Apple Mobile Device Service (AMDS) on Windows.
Please let me know in the comments section if this works for you.
