iphone4s jailbreak, but also to develop it?

Buy a iphone4s, also reluctant to jailbreak, iphone want to self-development, but I'm afraid jailbreak, you can not debug on a real machine?
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Not affected.
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This really does not affect
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Does not affect, forged a certificate can be a real machine test
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Does not matter
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Entirely possible, but often can not use positioning.
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Certainly does not affect
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Next a forged certificate ok
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http://kqwd.blog.163.com/blog/static/4122344820117191351263/

If you do not spend $ 99, which should be helpful for you
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Can Oh! !