Iphone 4 jailbrake

Hey guys just wondering if someone could tell me how to jailbrake iphone 4 running on latest firmware 4.2.1
thanks
Answer #1
redsn0w
Answer #2
i tried that but it installed cydia on my iphone and it wouldnt load
Answer #3
You need to restart your phone, I think.
Because when I install cydia, I always need to reboot the system.
But this jailbreak method is tethered, so you will need to plug it in when you start it jailbreak it again.
If you ask me, pretty dumb that you upgraded to 4.2.1!
Answer #4
i sorted it lol wot i did is i restored my firmware to 4.2 and then used limera1n and its workin fine