iPhone 3G - Downgrade your 3.1.3 baseband to 3.1.2. - NOT 3G[s]

[LVCIFER]

DOWNGRADE IPHONE 3G 3.1.3 BASEBAND TO IPHONE 3.1.2 BASEBAND

Note: This does not work with the 3G. AT ALL. This will only work with the iPhone 3G.*

Downgrade iPhone 3.1.3 Baseband 05.12.01 | Redmond Pie

 

[SuperI]

I clicked on the link and followed instructions to download redsn0w 0.9.4 for mac. I open the zip file and get to step 2. Please select the corresponding IPSW for your current firmware and there's no options to select. The browse button I can click on but not next or back only browse and cancel with no option to pick a firmware. any ideas on what i'm doing wrong?

 

[LVCIFER]

Take the zip file and rename it to *.ipsw instead of *.zip.

 

[LVCIFER]

Wait - you said you downloaded the redsn0w zip file. Did you actually download the Firmware file as well?

 

[LVCIFER]

And I think redsn0w 0.9.4 is only mainly used for the 2G. Have you tried it with redsn0w 0.9.3?

 

[SuperI]

Well, I have a 3g and I had updated the firmware to 3.1.3. I've never jb my phone before and new to all of this. So I want to downgrade to firmware to 3.1.2 and jb my phone. So I skipped step 1 and went to step 2

 

[LVCIFER]

Do you want to unlock your phone and use it on a differet cellular network as well?

 

[SuperI]

The site says to use 0.9.4 and 0.9.3 states only for 2g

 

[SuperI]

no, I just want to jb no unlocking needed

 

[LVCIFER]

Then you ONLY need to follow step #1.

Redsn0w

 

[IGoSlo]

I'm having a little dificulty downgrading using this procedure. 3g JB. Wife MADE mistake the other nite on iTunes.Upgraded to 3.1.3. Insisting on her "OLD" iPhone back. (she wants JB) When I origonally JB she was "LEARY". Now she's a "JB FREAK". HER words NOT mine. Here's what's happening:

1. Downloaded 3.1.2 Firmware. (Renamed & Saved as iPhone3.1.2.ipsw) to desktop.

2. Ran redsn02 9.4 several times. Everything says "DONE" but NO luck loading "Cydia" or JB'ing yet.
STILL trying.

Anyone else having this problem?

 

[IGoSlo]

SUCCESS

Got her 3g os3.1.3 JB BACK.... FREE AT LAST... FREE AT LAST...

 

[LVCIFER]

Yes, then I had it reversed in my head - 0.9.4 for the 3G, 0.9.3 for 2G. Gotcha.

 

[LVCIFER]

What process did you use to fix Cydia not appearing?

 

[IGoSlo]

After 15 x's ( I COUNTED) I was FINALLY able to JB... iPhone kept loading to Home page. Finally I Sort of guessed when help screen would apear and released power button while holding home button... ALMOST like placing in DFU mode.

REMEMBER download BOTH 3.1.2 firmware (rename from .zip to .ipsw and redsn0w0.9.4. There is also a very nicely guide to work with.... very impressed...