Originally Posted by h1uke
Any thoughts regarding my case?
I jailbroke a fresh unregistered 5.2.0 unit (got the "JailBreak!" banner and a "you're jailbroken" icon)
and immediately upgraded it to 5.3.0. This resulted to the situation when
all subsequent attempts to install usbnet_0.4N fail with error code 007.
If you didn't go with the jailbreak_bridge, you might have locked yourself out.