iPhone Generation : 16GB 3GS
Unlocked? (or Part Number): <It is imperative to fill this up; artificially unlocked iPhones (via software or hardware) do not constitute as officially unlocked. Refer to the next paragraph to determine your Part Number>
Current Firmware : 05.12.01
Current network: (for example Maxis) Get from Australia
iTunes Version : 9.1
PC/MAC : PC
Jailbreaking software : NA
Problem Encountered : Cant find the software to unlock/jail break 3.1.3 with firmware 05.12.01
Steps Taken So Far : Nothing done yet
Screenshot of Problem(if applicable) : Currently cannot connect to anything. Using digi but no signal. Wifi also cannot be connected.
Other Information/Remarks : Need help.

Just got the iphone from my sister in Australia. I know the iphone need to be unlock but cant find the correct software to unlock 3.1.3 firmware 05.12.01.
Please help.

But the iphone is now with me in Penang already.......