HT1400 I purchased a new chip but my iPhone 4S will not recognize the new chip so what do I need to do?

I purchased a new chip but my iPhone 4S will not recognize the new chip so what do I need to do?

okay from reading posts it seems if I transfer my backed up info from my old comp to the new one and erase my dad's phone's back up i could reset my phone and it would transfer all my old data back onto the phone, be linked to the new computer and i could proceed.  Where do i find the backed up info from my phone?

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