i've just upgraded my iphone 2G firmware to 3.0 and jailbreaked and unlocked it with redsnow and ultrasnow.
Everything work fine, the applications from cydia can work properly. The phone can be detected by itunes.
The problem is,the applications which i downloaded from itunes don't work even they can be installed with no errors.
does anybody know what shoud i do? I'm sorry for my bad English.