My iphone is currently jailbroken (with blackrain) on version 3.1.2 (I have an iPhone 3G)
Modem Firmware, 05.11.07

Cydia doesn't work any more, I have tried everything...reset the iphone ect, gets stuck on the cydia loading screen every time.

I think my phone requires an unlock, well it used to, but when I reset the phone earlier on, i-tunes said my phone was unlocked... Dont know why it done this but when I originally bought it (from australia, im in the uk) I needed to jailbreak and unlock it.

With all the upgrade options I am scared I am going to upgrade, then not be able to unlock/activate the phone.

I need Pdanet on the phone

Can anyone recommend the best option for me?

Cheers