Help to upgrade my iphone 3g

[dogweasle]

Hi
I have a iphone 3g on o2, it is jailbroken. I would like to upgrade to 3.1.2 but really not sure if I can or how to. Could someone please help or direct me to a really good step by step guide as really find some hard to follow when it starts talking about baseband and stuff. Sorry for being such a newbie. Huge thanks in advance

[IUiPodRepair]

Step 1 - iClarified - iPhone - How to Jailbreak Your iPhone, iPod Using BlackRa1n [Mac]

Step 2 - iClarified - iPhone - How to Unlock the iPhone 3G, 3GS Using BlackSn0w

Hope this helps.

[dogweasle]

Hi
Thanks for your help but I've got to step 10 to install blacksnow and it says
Note:The requested modifacations cannot be applied due to required dependencies or conflicts that cannot be automatically found or fixed.
Modifications
INSTALL blacksnOw
blacksnOw
Depends iphone Firmware>=3.1


Have I done something wrong or does this mean I not able to upgrade.

[Poseidon79]

You have to restore in iTunes to 3.1.2 FIRST before doing all the other stuff.

[dogweasle]

Thanks I'll try that then but on the step 1 that IUiPodRepair has advised about it says for mac and I have windows you don't have a link for windows do you ?