I assume your phone was jailbreak by ziphone. iPhone thats been jailbreak by ziphone will face this issue coz it did not enable a service (AFC2 or AF2C if not mistaken) to run. This only happen if you use iphonebrowser, it will show that the phone has not been jailbreak. If u use SSH, u can view all the filesytem. To overcome this, install ZiPhone iBrickr fix from iClarified (or was it i.unlock.no ... err mana mana la). This fix will enable the service and iphonebrowser will detect it as jailbroken.

Last time u got problem coz u jailbreak an already jailbroken phone. Of couse la kaput. 

And to answer my question back ... no its not possible to unlock (software based unlock) an iPhone without jailbreaking it first.

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Added on July 11, 2008, 6:21 pm

Waaa ini org lama tarak nampak ... sekarang masuk buat kacau aaaa.