I bought an iphone, was firmware 2.0, I downgraded to 1.1.4, then tried to unlock it with ziphone, didn't work, so tried iliberty+, which worked perfectly.
Got Cydia and everything works fine so far, other than youtube and pocketguitar.
Pianist for example runs fine, but after installing pocket guitar, and hitting the pocket guitar icon, the screen goes black and after 2 seconds goes back to the main screen.
Any ideas?