How to downgrade and jailbreak iPhone 3GS accidentally updated to 4.0 (New BOOTROM)

**sinhan03** · 07-07-2010 08:23 PM

I don't save my shsh in the server. But I did save my 3.1.3 shsh in my computer. How can I JB my Iphone3gs new bootrom IS4.0? Is it possible?

**Leon2607** · 07-07-2010 08:59 PM

I can't see this working, but if someone is on ios4.0 then guess there's nothing too loose.

Definetly don't try this if your iPhone is currently jailbroken. Chances are is that you will lose it and have to join the rest of the 4.0 iPlop crew!!

**Olethros** · 07-07-2010 09:58 PM

Originally Posted by sinhan03

I don't save my shsh in the server. But I did save my 3.1.3 shsh in my computer. How can I JB my Iphone3gs new bootrom IS4.0? Is it possible?

Yes you can downgrade using your locally saved SHSH with TinyUmbrella

There is no up to date guide since TinyTSS and Umbrella were merged into one app, but you can look at Hack that Phone - iPhone 3G S: Restoring "forbidden" firmware and adapt the steps there.

**Leon2607** · 07-08-2010 12:42 AM

Originally Posted by sinhan03

I don't save my shsh in the server. But I did save my 3.1.3 shsh in my computer. How can I JB my Iphone3gs new bootrom IS4.0? Is it possible?

Check xsellize.com

They have some descent guides for this.

**Olethros** · 07-08-2010 10:43 AM

Originally Posted by Leon2607

Check REDACTED

They have some descent guides for this.

Please don't refer people to a site that specialises in application piracy. We do not encourage or endorse such sites here at hackint0sh.

As I posted earlier.

Hack that Phone - iPhone 3G S: Restoring "forbidden" firmware is the approved guide for using The Firmware Umbrella / Tiny TSS to do this.

**Leon2607** · 07-08-2010 10:49 AM

Ok - sorry.

I didn't realise they encourage piracy.

**lakshi** · 07-08-2010 08:23 PM

will this procedure work on 3gs old bootrom?

**abdabs** · 07-08-2010 11:11 PM

I accidentally updated my iphone 3gs to ios4.
I followed these steps(completed 1-3), and it doesn't work.
servers added to the hosts file:
74.208.105.171 gs.apple.com
74.208.10.249 gs.apple.com

I get the error(3194) once verifying with apple at the beginning.
I don't have any old SHSH to use.

Does this mean I'm stucked until any further ios4 jailbreak release?

**bigfishman** · 07-08-2010 11:53 PM

Originally Posted by abdabs

I accidentally updated my iphone 3gs to ios4.
I followed these steps(completed 1-3), and it doesn't work.
servers added to the hosts file:
74.208.105.171 gs.apple.com
74.208.10.249 gs.apple.com

I get the error(3194) once verifying with apple at the beginning.
I don't have any old SHSH to use.

Does this mean I'm stucked until any further ios4 jailbreak release?

yes quite simply your stuck.

**mcbolton4** · 07-15-2010 10:26 PM

My brother-in-law on AT&T gave me his 3GS after upgrading to iPhone 4. It was bought originally with 3.1.2 or earlier. He said he has maintained updates through iTunes so the BB is 5.12.07 and its on 3.1.3. What tools for Windows (PC) can i use to JB and unlock so I can use T-Mo in the US.

Can someone help me out here?