Hello I buy iphone 4 from GB but i dont know witch network ( o2 , vodafone,) how to check ??? I lving in poland maybye somebody can help ??? I think , only one way to chceck is fix sim card and try???
If your buying one from apple it will come unlocked. If not as far as I know the ony way to tell is buy putting a sim in and check it works. Or you could give apple a call with the serial no of the phone and they will tell you...