I tried to unlock my friends iphone 3gs 3.1.2 on his PC with Blackra1n. My first attempt failed so I tried again. Everything seemed like it worked but when I open the blackra1n app it immediately collapses as soon as it starts to open. Can anyone help?! I tried reinstalling blackra1n numerous times with no success... I also tried to jailbreak with my macbook pro. It feels like I have a partially installed blackra1n which I cannot delete or install over!! Does anyone have any advice on deleting the app so I can try again on my Mac?.. Unfortunately, his phone auto synced with that partial blackrain app on it so a restore wont work. Also, his bootRom is to new to pwnage it. Any other ideas or advice would be greatly appreciated.