As of the iOS Update 4.0.1, it is impossible to use the TIFF exploit found at www.jailbreakme.com, one of the only ways to JailBreak without a computer. And before you go asking if JailBreaking is illegal, the answer is a resounding NO!!! Congress passed a new DMCA exemption specifically making JailBreaking legal.
no... as far as i know you need a computer. -james
Suck my balls
using blackra1n.com
To jailbreak an ipod touch or an iphone, i recommend using blackra1n from blackra1n.com Have no fear when Jailbreaking because it is a soft mod, and can be restored using the restore button on itunes.
When you jailbreak an iPhone cydia is installed and Apple limitations are removed from iOS. A tethered jailbreak means you will have to connect to computer everytime you want to start your iPhone. While in untethered you do not need to connect to computer.
There is only reason for why an iPhone needs to be jailbreak. The reason for a iPhone to be jailbreak would be for using the phone for a different service.
It allows you to run Un-Offical Software on your iPhone using Cydia!
Using redsnow because jailbreakme.com does not work
This only works on iPod touch third generation, iPad,or iPhone and you have to have iOS 4. If you are using the second generation, you will have to jailbreak you iPod touch.
Yes, using Sn0wbreeze. Just a google search will take you to the site.
With RedSn0w there is the option (when jailbreaking) to add multitasking and a homescreen wallpaper.
Yes, you can use Absinthe 2.0.1 to jailbreak iOS 5.1.1. Here is a website with step-by-step instructions on how to jailbreak: http://www.redmondpie.com/jailbreak-5.1.1-untethered-iphone-4s-ipad-3-ipod-touch-and-more-using-absinthe-2.0-video-tutorial/