iPod touch I need to downgrade my firmware

[NateF]

i need to downgrade my 2nd gen touch to 3.1.2 firmware i am running 4.2.1
the reason, i just bought a new head unit, radio for those who dont know what it is, and it says it will not work if im not using that firmware, is there a way to without itunes since they blocked anyone from doing it, im sick of finding dead ends and not finding any step by step instructions on how i can, any help would be greatly appreciated, i have a 3rd gen but its supposedly not compatible, im just at my wits end and i dont wanna throw away money on a head unit i cant use with my ipod

 

[likethesoup2]

Purely out of curiosity -- why does your 'head unit' care what your OS is?

By 'head unit', I presume you're referring to a vehicle stereo; I use mine (4th gen), with my car stereo and it doesn't care what the OS is.

So . . . ???

 

[NateF]

according to the website and and users manual yes i cant call to ask them cuz they are not open til 11 am est

 

[mstrze]

according to the website and and users manual yes i cant call to ask them cuz they are not open til 11 am est

And I take it that you have already tried hooking up the iPod to the head unit and it doesn't work?

 

[NateF]

yep reset ipod reset head unit 5 times still USB device error on head unit

 

[Saberon]

You're not going to be able to restore, Apple doesn't sign anything but 4.3.5 anymore.

Sounds like you may be jailbroken and that's likely the cause of your problems.

 

[NateF]

no jailbreak

 

[Consultant]

Second gen can be downgraded without SHSH.

 

[NateF]

Second gen can be downgraded without SHSH.

explain?

 

[Spectrum Abuser]

Second gen can be downgraded without SHSH.

MB second gen can. The OP did not state whether his was an MB or MC.