ok so as soon as i get the iPhone 5, i am going to jailbreak my 4. i need to get past the setup screen without activating. so basically, an iPod touch. then i will jailbreak with green pois0n. is theree a way to do this?
so how exactly can i do this?
Redsn0w or Sn0wbreeze depending on firmware.
Jailbreak your phone. It will not void your applecare. I don't know where you got that information. Worse comes to worst and you need to take your phone back to apple, you just restore it. There really is no reason not to jailbreak, if you're worried about warranty.
Not to mention you can hacktivate said phone, with Redsn0w or Sn0wbreeze depending on firmware. Without it being jailbroken.