It can if u do not do it properly.
Not at all. Jailbreaking breaks down any restrictions implemented by apple. Basically, all it does is allows third party apps to access the flash memory. It will not slow it down at all.
You can jailbreak an iphone 4s easily. All you have to do is go online and download the app for it.
they are all the same
Here's a guide on how to jailbreak your iPhone iPod or iPad ios 4.2.1 and all previous models: http://reviews.ebay.com/How-to-Jailbreak-Your-iPhone-4G-iTouch-or-iPad-4-2-1_W0QQugidZ10000000020131595 I followed the step by step instructions and jailbroke my iPhone within minutes!
back up all your junk on itunes then restore and put all your junk back on. POOF jailbreak gone
no. you just simply plug in your iPhone to you PC and open up itunes. set your iPhone to transfer all music and it will put it on there.
Yes you can you just need to download the correct jailbreak software.
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well it's upto experts to do itbut if you want to do it yourself think about how to get cydia installed on the iphone passing all those securities
If your iPhone is unlocked, then yes, all carriers will work. But if it is locked to a certain carrier, then you will have to unlock it using a jailbreak.
If you update your iPhone/iPod, you will remove the jailbreak, then you would have to wait until the jailbreaking websites invent a jailbreak for the new ios, but why update if you jailbroke it?
No, there is no way to jailbreak iOS 6 without a computer. Only older iOSes can.