iphonenulled.blogspot.com - First of all you need to know what the jailbreak, what is jailbreak? or jailbreak iOS?jailbreak iOS is a kind of cracking or penetrate the iOS's system so that the user can penetrate the root system iOS and can be more flexible in use iOS's device,like installing 3rd party apps, tweaks, etc.Most jailbreak the device iOS that in order to "Download a free application" that has been on crack through an application downloaded from Cydia called Installous.
There are two types of jailbreak, which is Tethered and Untethered.
1. Tethered jailbreak
If your tethered jailbreak iOS devices, then when you die, the iOS device to turn it on you have to connect your iOS device to your PC and use your jailbreak apps to turn it on.
2. the Untethered Jailbreak
In contrast with the tethered jailbreak iOS devices, if you die, you don't need a PC to turn it on again, simply by pressing the "sleep". 
