I just jailbroke my iPhone 4s and I'm not sure how to do some things?

I wanted to change the SMS background but I don't think I can.
Can you give me some websites?
I'm not sure if the 4s doesn't let me do certain things?

Use the app winter board. I think this is what your asking. It is a cydia app that lets you change everything about your phone. And ps did your contacts get deleted? I want to jailbreak my phone but I'm worried if my contacts get deleted

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