Hi everyone. Recently got my iphone 4, I used it for a few days and noticed a few scratches on the back glass so I quickly ordered some Invisible Shield for it, after applying it it has totally ruined the idea of glass, it just feels sticky and trying to swipe my finger across the screen results in juddering movements, its crap. MY question is, how easy is the front screen to replace if and when I get fed up of how many scratches I have got on it and maybe where and how much? Also is there any chance the front and back glass is different, yes I saw a thread on it but still undecided from its outcome. PS im in the UK so I dont think an Apple store would be an option, would my network provider who I curently have a contract with be able to help me.