Downgrade from iPhone OS 3.0 to 2.2.1
Yesterday, I tried installing OS 3.0 on my iPhone which was done successfully, but the thing is that I got that stupid “NO SIGNAL” error after using QuickPWN to JailBreak it.
I kept on searching for a way to restore back 2.2.1 and I found this video on YouTube.
it works!
Enjoy downgrading!
its kinda risky to upgrade now i’ll wait for the official release in june