Downgrading iPhone 3G 4.2.1 -> 3.1.3 [Horror ! :D]

[Flisker]

Hi guys,

If anybody here could solve my problem it would be miracle

I am trying to downgrade my iPhone 3G from 4.2.1 to something ... 3.1.3/3.1.2/Whitedoor5 .

But nothing works, I have installed libusb , recboot is working for me, but thats pretty much it .

I tried toon of things , iReb5 , TinyUmbrella (I am not sure if I this right) and still when I try restore iphone with different firmware or customfirmware it says error : 16XX -> 1 3 4 45 46 error.... and so on . Also I tried DFU, pwned DFU (by iReb5) , restore or normal mode .

I have no idea what else should i try.

I am using latest iTunes x64.

Thx in advance for any help.

[Susty]

Do you have shsh's? If not, you won't be able to downgrade.

[xboxbml]

I don't think u need shsh for a 3G..

[Susty]

Sorry, yeah because it's going lower than ios4. So once the phone is in DFU mode, your holding alt & pressing restore (or shift & restore on windows)? When't the error occurring?

[Flisker]

So pwning DFU went fine , than I started restore process -> extracting software -> preparing iphone for restore (this took a while) -> error 1601 and also I got whitescreen on phone now.

[Susty]

Ok, then you use recboot to kick it out at that stage.

[Flisker]

Kicking it out wasn't problem, but still cant get that 3.1.3 in there : (

[Susty]

That'll kicks it out of DFU, then shift restore again, you'll get an error again, put it back into DFU mode, then restore the phone by selecting the custom firmware that you have. Sounds like a pain in the you know what...

Error 1601 Help please

[Flisker]

So I got custom 3.1.3 fw installing but after installation, OS got stucked on loading screen . And now I cant restore again. I am back to random errors 1600 first try , 1602 secon try , omg

[iYeow]

You should restore to 4.1, if you don't enable Multitask , 3G iphone should perform well. Put your iphone into recovery mode and restore to stock 4.1 and if you error at 1015, kick it out with Tiny umbrella.

[Flisker]

Thx. I'll give it a shot

[iYeow]

Did you get it going ?

[Flisker]

So now its doing still same thing regardless what do I try to restore -> while restoring screen goes white but just for a moment than pc makes few sounds (probably disconnecting and connecting phone) and phone restarts itself , than I get 1646 error .

[iYeow]

Have you tried changing USB cable or use different USB ports.

[Flisker]

So same thing. Sound - Black Screen - Sound - White screen - Sound Apple Logo - Sound - Old OS Loaded - Sound - 1646 Error

Actually only thing that was working for me so far was official restoring to 4.2.1 fw

Btw now I am always using iReb to get phone into pwned dfu before restoring to custim firmware , thats ok right ?

[iYeow]

No, don't use pwned dfu mode. Trigger a normal dfu mode to downgrade to stock 4.1 .

[Flisker]

I tried normal dfu and stock 3.1.3 and it worked but how do I jailbreak it now?

[iYeow]

Good, you can use Redsn0w 0.9.4 , browse to stock 3.1.2 to jailbreak it .

The only problem here is your cydia version is too old and may have issue when downloading or updating cydia apps. You may need to find cydia deb file of 1.1.1 , use ifile or ssh into iphone and change it.
I would recommend go to 4.1 and use Redsn0w 0.9.6b6 to jailbreak it .

Now you are 3.1.3, to go to 4.1, you don't use dfu mode , use Recovery mode and restore to stock 4.1, Exit recovery to kick error 1015.

[Flisker]

So I used Redsn0w 0.9.4 browsed for 3.2.1 cos 3.1.3 is unrecognisible , everything went ok , last message was Done! but when phone restarted there were no custom logo no cydia nothing : (

The rest of your process takes place on device and nothing is going on anywhere

And whole process takes like 3minutes +-

Same thing with blackrain .. make it wain .. blablabla .. done .. and of course nothing changed