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Can anyone else chime in on a better alternative (not necessarily cheaper)?

I fear using Rock, I've heard mixed things about it and ruining the stability of the phone, which I refuse to do. I want to keep my iPhone 4 jailbreak/unlock as clean as possible. I've jailbroken every iPhone I've had (which is every generation) and I know how slow and wonky things get when you try out every app under the sun haha.
 
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