Help unlocking iPhone 3GS 16gb on 4.0

[SpeedyCycles]

I purchased a used iPhone and I want to wipe it clean and do my own unlock on it. The iPhone:

3GS, 16gb, 4.0 (8A283) and firmware 05.13.04

I am on a macbook pro intel running 10.6

I don't think I have SHSH's saved.

How do I know if I have new or old boot device?


I tried to used Jailbreakme.com and it put Cydia on, however the icon is white and it indicates there are some errors. So I just want to start all over. What do you suggest (4.0, 4.1, etc?) and how do I go about doing it? This will be my wifes phone so I just want it to run reliably.



Thanks!

[Simon]

Download tiny umbrella to find out what SHSH you have. Also download idetector to find out your bootrom. Then you can go from there.

[SpeedyCycles]

Download tiny umbrella to find out what SHSH you have. Also download idetector to find out your bootrom. Then you can go from there.

Okay, I am not sure if I am giving your the correct info on the SHSH. This phone (prior to my doing it right now) has never been unlocked (so I was told) if that helps.

Here is a screen shot:





And I cannot figure out how to download iDetector for OS X.

Thanks!

[Simon]

Download tiny umbrella from here: The Firmware Umbrella - TinyUmbrella
You need the newest version. Connect your device and press save SHSH.

On Mac use this to check your bootrom version: iClarified - iPhone - How to Check the Bootrom Version of Your iPhone (Mac)