Reverting back to 4.0.1 for the iPhone 4

[Detroit_Waves]

Hey guys,

So after taking my iPhone 4 into apple, they performed a hard reset in store. I didnt realise until I was messing around today, that this has obviously updated the software to 4.0.2, which is now no good for me, as I need to jailbreak this, to change my sim card across.

Could anyone fill me in on how I can revert this back to 4.0.1? I have seen it mentioned, but cant seem to find a direct walkthrough on how to do this. As this is something I would rather not mess up.

Thanks!

 

[millsy888]

In itunes hold shift while clicking restore i think. Oh and no talk of jailbreaking allowed.

 

[Yas786]

In itunes hold shift while clicking restore i think. Oh and no talk of jailbreaking allowed.

Perhaps you want to read the stickies once in a while...jailbreaking is allowed now

http://forums.overclockers.co.uk/showthread.php?t=18170850

 

[Detroit_Waves]

haha yeah, I wouldnt have asked if talk of jailbreaking wasnt allowed.

Can anyone confirm the shift and restore method?

 

[JonB]

Yes. Download the old firmwares here: http://www.iclarified.com/entry/index.php?enid=750

 

[Deleted member 651465]

I can confirm you can use alternate IPSW files, but doesn't 4.0.2 update the baseband?

 

[Detroit_Waves]

what do you mean by updating the baseband EVH?

 

[Deleted member 651465]

Certain firmwares update the modem firmware, so even when you revert to older device firmware the modem firmware won't downgrade.

I'm not sure if 4.0.2 does this, but it's generally why they tell people not to update until the next unlock is out etc.

 

[Detroit_Waves]

Oh OK, and if the modem firmware is upgraded, then you cant jailbreak?

Looking at it, my modem firmware is 01.59.00, which I think is jailbreakable?

Ive downloaded the older firmware, so do I now just plug into itunes, hold shift and press restore, and then it will give me an option of using the older firmware, somewhere, right?

Also once I have done this, will I then be able to use my backup of my phone currently, and put it back onto the phone? Even though it is currently using 0.2, and ill be going back to 0.1?

Sorry for the all the questions, and thanks for all the help!

 

[Skully]

http://www.redmondpie.com/downgrade-ios-4.0.2-to-ios-4.0.1-4.0-iphone-4-3gs-ipod-touch-how-to-guide/

That's the guide I used to downgrade mine from 4.02 to 4.01.

But bare in mind I had my SHSH saved!

 

[Detroit_Waves]

OK so now Im getting majorly confused. Ive never even heard of SHSH blogs before? So, I dont have these saved, seeing as I didnt even know what they were. So because I havent got them saved, this means I cant jailbreak my phone successfully now??

 

[Skully]

When it was previously jailbroken did you click Make my life easier within Cydia?

If not you're pretty much out of luck .

 

[Detroit_Waves]

Ive never jailbroken it before, so no

Crap!

No solution at all?

 

[Skully]

http://www.redmondpie.com/jailbreak...with-pwnagetool-custom-firmware-how-to-guide/

That's the only solution but you must have the old bootrom which you probably don't have, looks like you may have to wait .

 

[Detroit_Waves]

It says that is for the 3GS, I have the 4. Although, either way, I wont have the bootrom so I guess its pointless.

They never mentioned this SHSH stuff on iClarified, so im glad someone mentioned it, otherwise I was about to go ahead with it.

Until something happens, Im pretty much stuck with an Iphone 4 paperweight, as I cant use it over here! Rubbish!

 

[PiKe]

You just need to be patient for a couple of weeks until 4.1 is out, then they'll release the new jailbreak.

 

[Detroit_Waves]

Doesnt usually take a while for a new jailbreak to be released after the update however?

 

[PiKe]

Doesnt usually take a while for a new jailbreak to be released after the update however?

They already found a method in 4.0.2 but are keeping it hush hush until 4.1 comes out.

Otherwise Apple will just fix it again.

 

[millsy888]

Perhaps you want to read the stickies once in a while...jailbreaking is allowed now

http://forums.overclockers.co.uk/showthread.php?t=18170850

Not been on the forums for a while. Guess it's time for a refresher course

 

[Detroit_Waves]

Thanks for all the help guys,

However I got it sorted another way, I was having problems with the proximity sensor on the phone anyways, so took it in and got it replaced for a new one today. I didnt realise however, that the phones from Apple come unlocked. So, now I can use both sim cards without a problem. No jailbreak required!