I updated my iPad from iOS 4 to iOS 5 yesterday, without making any backup. However, I found that it is not convenient for me to debug my programs. So I want to restore it to iOS 4 again.
I did as follows:
- Downloaded iOS 4.3.3
- Downloaded iTunes 10.4 to replace 10.5
- Connected iPad with my PC
- First, I click the on/off button for seconds and then keep clicking the on/off button and home button for about 10 seconds. At last, I keep clicking the home button only for about 15 seconds. iTunes detected my iPad in restore mode.
- Following the tips of iTunes, I clicked "Option" and "Restore" button to choose the Firmware I downloaded and tried to restore my iPad.
However, something is wrong here. The error is:
this device isn't eligible for the requested build
Can anyone give me an idea?