If it is an iTouch, iPod, etc, you cannot take it to an Apple store to get fixed, updated, etc. as they do not accept jailbroken devices.
Jailbreaking allows you to customise your device considerably more than Apple allows you to by default. The customisation aspect of jailbreaking is what the majority of iPod Touch users want when jailbreaking their device.However, do note that jailbreaking your device will void your warranty. This means that should something go wrong with your device Apple will not fix or replace your device.
Jailbreaking is the term used when cracking an iOS Device while Rooting is the term used for cracking an Android Device.
You can root your iPone 4S by jailbreaking your device.
Yes by jailbreaking your apple device
i think they still will because they are doing anything to stop you from jailbreaking.
altering the factory software so you can download stuff from other places not only of the app store. jailbreaking can be dangerous for your device
no, but i woudnt try it
Not that I know. Sorry.
It basically gives the I device different functionality that Apple didnt approve of. It's safe if you know what you can and cannot install. There's a reason Apple doesn't allow these things on their devices, but not neccessarily all of it is bad. However, jailbreaking your device incorrectly, or downloading bad software, can brick your I device, making it unusable.
Music-wise, jailbreaking does not get you any free music that you wouldnt have had without jailbreaking it. You can find free music anywhere online, with or without a jailbreak. Jailbreaking does not get you free music, but does get you mods, apps, etc.
YES, "jailbreaking" or ANY type of modifying the device does VOID ALL warranties from apple. [But in my opinion: I don't give a flying f*** for warranties]
When Jailbreaking a device, if the device breaks, the specified device cannot be taken back to apple unless it is restored. Jailbreaking can also make battery life worse, as more 'daemons' are running, such as themes, and back-grounding applications. However, Jailbreaking allows you to download app store applications for free, theme your device, and do so much more than before! The pros definitely out-way to cons! If your device screen breaks and you have to send it to apple, simply plug it into iTunes and click the restore button, which removes the jailbreak.