Guidance on Jailbreaking! Please help!

[jler02]

Hi,

Thanks for looking.

Just need a bit of help on how to update my iPhone 3GS to the latest iOS firmware and maintaining my jailbreak/unlock.

Currently on firmware 3.1.3 (Build: 7E18) and baseband 05.12.01 (untethered).
Model number is an MC, so new bootrom. Jailbroken using Spirit and unlocked with ultrasn0w.

Cydia says I have SHSH blobs for 3.1.2, 3.1.3, 4.0, 4.0.1, 4.0.2, 4.1, 4.2.1+...

Only have a laptop running Windows 7, so all jailbreak programs must be Windows compatible.

Last thing, I've lost the original SIM so if activation is required, this won't be possible although the iPhone was activated legitimately when purchased...

What do I do? Thanks in advance,

J

[Goof]

To update you cannot keep your jailbreak and unlock but you can update then re-jailbreak and re-unlock. You can also keep your current baseband to unlock without having to use iPad Baseband.

How to Update an iPhone and Preserve the Baseband

1) Download PwnageTool 4.2 if your on a Mac from Here

OR

Download Sn0wbreeze if you are on Windows from Here

2) Download the 4.2.1 firmware from Here

3) Open whichever program you downloaded and browse and select the firmware that you just downloaded.

4) Select Baseband Preservation Mode and create a custom firmware.

5) Plug your iPhone into the computer and put it into DFU Mode, your screen should be black and should NOT have the recovery mode logo on it.

6) iTunes will recognize your iPhone as in recovery mode and then restore your iPhone with the 4.2.1 Custom firmware you just created.

Once the restore is done your baseband should have stayed the same.

7) Unlock your iPhone using Ultrasn0w 1.2 in Cydia.

If you have any problems here is a video guide on how to do it.

Video Guide

Sent from my iPhone using ModMyi

[i.Annie]

MC doesn't necessarily mean new boot for iPhone 3GS. It can be old boot too. Another means of checking like iDetector is better to determine.

But the boot is irrelevant at this time as all jb are untethered on 4.2.1 now. Follow iGoof's instructions and you'll be fine.

[jler02]

Thanks for your speedy reply.

I will try this.

My only last question is that you are sure that after the restoration I will not need to activate the phone with the original sim(?)

Cheers

J

[i.Annie]

While creating the custom firmware you get to select in expert mode to activate so you won't need a SIM

[jler02]

Thanks for all your help.

Just followed the guide as above however I am now stuck with a white screen on the iPhone as iTunes gave error 2002 while restoring with custom firmware...

What do I do!?!?

<EDIT> Restarted the computer and started again... Seems to be working! </EDIT>

[Goof]

Did you put your iPhone into DFU mode?

[jler02]

It's defo in DFU.
iPhone just restarted after finishing sn0wbreeze...

Success!

THANK YOU VERY MUCH!!

Sorry for the spam!

Only one last thing now...

There is no sound... It says an 'unsupported accessory' is plugged in and the volume bar has disappeared from iPod etc.

Any ideas?

[i.Annie]

Something isnt right. Sn0wbreeze can be buggy. Create a new custom fw. Be sure when putting into DFU you're using pwned DFU mode, not sure but if you didn't do this it much be a problem.

[jler02]

Running a new custom fw didn't work either.

But I've fixed the problem! If it's of interest, I installed OpenSSH and Winscp.

Navigated to /System/Library/LaunchDaemons/

and deleted com.apple.accessoryd.plist

Reboot.

Fix.