Why do you need to jailbreak iPhone?

Answer 1

Yes you can, the software has already been jailbroken by developers not even 24 hours after it was released to them. Once the phone comes out, you should be able to jailbreak it yourself using their software relatively quickly.

Answer 2

It allows you to download and run apps that are not permitted by Apple and allows you to install themes, it also lets you unlock your iPhone so you can use different carriers other than the stock carrier

Answer 3

Technically you don't although research has found that many people do to unlock new ways of using their Iphone. But be warned it will void your current warranty from the supplier you bought it of.

Answer 4

It's up to user preference whether or not to jailbreak your iDevice but there are a lot of benefits in doing so, like additional customization benefits.

Answer 5

Yes, all you do is sync it up iTunes, then Restore it. Everything should be back to its original factory settings.

Answer 6

no not since apple aproved of most of it