hi, im a bit new at this but i want to unlock my iphone. It was previously unlocked but it is now in a state where you can only make emergency calls and it has the little white cable with the itunes logo. i connected the iphone to my computer but itunes does not detect it. i already enabled and started the services under the administrative tools and also reinstalled itunes at least twice. IT charges the iphone but thats about it. I need help!!