How-to Fix An Unknown Error (1601) while restoring iPhone custom firmware iOS 4.2.1.

The iPhone “iPhone” could not be restored. An unknown error occurred (1601).
Fix 1601 Unknown Error by following these steps:
[click to continue…]
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How-to Fix An Unknown Error (1601) while restoring iPhone custom firmware iOS 4.2.1.

The iPhone “iPhone” could not be restored. An unknown error occurred (1601).
Fix 1601 Unknown Error by following these steps:
[click to continue…]
How-to Fix An Unknown Error (1600) while restoring iPhone custom firmware iOS 4.2.1.

The iPhone “iPhone” could not be restored. An unknown error occurred (1600).
Fix 1600 Unknown Error by following these steps:
[click to continue…]

The Application “ ” was not installed on the iPhone “ ” because an unknown error occurred (0xE8008001).
Are you keep getting this 0xE8008001 error everytime you tried syncing your iPhone with iTunes?
You just finish downloading new iPhone application(s) and tried to install it to your iPhone via iTunes. But, when you were syncing the new apps, all you got is 0xE8008001 error.
It happened because the apps is failed to pass DRM-check on iTunes. More information about this process is explained here: What is AppSync
How-to fix unknown error 0xE8008001 ?
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