Hi, I've seen a guy selling iphones that have the screen smashed and I thought I'd repair the screen to resell or use as another phone. I'm not an Apple user, so I don't know much about the software and hardware, but I want to make sure that its only the screen that is broken and nothing else. I was told that they have been restored to wipe the data off them, but when I asked if everything else works and if there is a way to check it, he said that the iphone would not have restored if things like the sim slot, networking, etc weren't working. is this true? I have a feeling that its not, but wanted to make sure so I thought I'd ask here.