Upgrade 3.1.3 -> 4.x + Unlock

[C3NKO]

Heyya people, I need some advice.

I've got a 3GS here with 3.1.3 but it doesn't function the proper way.
I was thinking to upgrade the 3GS to an 4.x, but with the option to jailbreak + unlock.

What is the best way how I can do this?

[iYeow]

Update your itunes first.
You can restore to custom firmware of 4.1 created by Pwnage tools 4.1.2 or Snowbreeze 2.1.

[Simon]

On Mac use: iClarified - iPhone - How to Jailbreak Your iPhone 3GS Using PwnageTool (Mac) [4.1]
On Windows: HOW TO: Jailbreak iOS 4.1 with Sn0wbreeze 2.1

[iYeow]

I have a custom activated copy of 4.1. You have to download Redsn0w 0.9.6b2 and download the stock firmware of 4.1. Run Redsn0w and browse to stock 4.1. Check only the box that says : DFU mode only. Perform your DFU process.
Once DFU is done, open up Itunes and restore to this file which I will include in your PM box.
Once restored you are already jailbroken at 4.1 and install Ultrasn0w to unlock.

[C3NKO]

Thank you both, and just for confirmation.
4.1 is unlockable by Ultrasn0w?

nevermind, Q already been answered!

[iYeow]

The baseband of 4.1 itself is not unlockable but restoring to custom firmware of 4.1 preserves your baseband to be unlockable.

[Simon]

Thank you both, and just for confirmation.
4.1 is unlockable by Ultrasn0w?

If you restore using one of these methods yes. If you restore using a regular 4.1 firmware then not yet.

[C3NKO]

Is it OK if I use Redsnow 0.9.6b4 ?

Because Redsnow asks if this the newer 3Gs (with bootrom I guess) ..
And it is.. is that a problem?

[Simon]

What are you doing again?

[C3NKO]

I have a custom activated copy of 4.1. You have to download Redsn0w 0.9.6b2 and download the stock firmware of 4.1. Run Redsn0w and browse to stock 4.1. Check only the box that says : DFU mode only. Perform your DFU process.
Once DFU is done, open up Itunes and restore to this file which I will include in your PM box.
Once restored you are already jailbroken at 4.1 and install Ultrasn0w to unlock.

____


I am using Redsnow 0.9.6b4 and followed this instructions:

1. Make Backup.
2. Newest iTunes (Me: 10.1.0.54)
3. Redsnow browse stock 4.1 (Downloaded from your link: HOW TO: Jailbreak iOS 4.1 with Sn0wbreeze 2.1)
4. Redsnow box check: pwned DFU only.
5. After finish, restore the custom firmware in iTunes.
6. After that I get an error

What are you doing again?

Upgrading 3GS from 3.1.3 to custom 4.1 to get a 4.x with Unlock.

___________

Edit:

Strange.. it's working now.