How to jailbreak an iPhone 3 without a computer or cydia?

I don't own a laptop and jailbreakme says cydia is no applicable with the 3. But I can't get apps cuz the ones I need need iOS 5.

I would recommend installous (to install apps) but i heard its illegal and so is jailbreaking

You have to do it from computer. Check the safe and easy jailbreak guide:

http://iphonejailbreak-unlock.com/how-to-unlock-jailbreak

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