ok so i have a black iphone, i replaced the silver back with the one from cnn.cn. everything worked out ok except for the fact the silent/vibrate button broke. im planning on selling it on ebay because i realy need that button and i dont want to open my phone again to try and fix it. since the button is broken and the warrenty is void from making the phone black, i no it has less chances of selling. would unlocking it make it of greater value?