Hi! I recently sold my old iPhone to a friend and I requested an unlock code. I then received an email saying that the phone was automatically unlocked because it was an apple product. He tried his SIM card for the network Vodafone and then phone said it was incompatible. He went to his local 3 store and they confirmed the phone should be unlocked, he also went to his local compuB where he was told that the phone was actually not unlocked. This has been a long and difficult process and I would really like an answer as to why his sim will not work.