3G on 4.1 Jailbreak method

[iYeow]

Cool, but this is going to be a long process. Do you want to proceed ? Do you have access to a Mac ?

[Kareen]

No access to a mac and he actually has to take off. Told him not to sync and we can pick it up tomorrow. I'm off at 3:30AKST. Is that good for you, or is there a guide?

[iYeow]

For Xp, download Snowbreeze 2.0.2 and use expert mode , under General unchecked activate my iphone. Build your custom firmware and when it is done it will be placed on your desktop called Snowbreeze_4.1.ipsw.
Now run Redsn0w 0.9.6b2 to put your iphone into DFU mode ( Not to jailbreak , just up to DFU mode )
Once you are in DFU mode, do the Shift + Restore to Snowbreeze_4.1.ipsw
Once fully restored, you are at Emergency Screen.
Put your official sim card in to activate
Now your iphone is jailbroken only with Official carrier at IOS 4.1

[Kareen]

Same thing for Win7 X64?

[iYeow]

You mean no Cydia or error ?

[i.Annie]

Win 7 64-bit is probably the culprit... It's not very good with most jb tools...

[iYeow]

Alright , do this the long process.
Download 3.1.2 ipsw and download Redsn0w 0.9.4
Put your iphone into DFU mode : Plug your iphone in and it will be ON.
Hold Power + Home button for 10 secs
Release the Power button, but keep holding the Home button for 10 secs until you hear a sound Ding dong. Release it. The screen is black.
Now do the Shift + Restore to 3.1.2
Error 1015 pops up, use exit recovery from Tiny umbrella
Now you are at emergency screen or Home Screen if you have the ATNT sim in, it doesn't matter.
Run Redsn0w 0.9.4 to jailbreak it first.
Now you are jailbroken at 3.1.2 with Redsn0w.
Download ireb 4.1 from iH8sn0w.com | Jailbreak your iPod touches and iPhones
Plug your iphone in, run ireb 4.1 to put you into DFU mode
Now Do the Shift + Restore to Snowbreeze_4.1.ipsw which you have created earlier.
Once restored, if you have your ATNT sim still inside, it will activate
Now you are at Home Screen and jailbroken at 4.1 with ATNT carrier.