I need some clarification on this issue, as everywhere people seem to give me a different answer. My plan is this: someone I know is going to get a new iPhone with their Vodafone contract. However, they are giving me the iPhone to use for myself. Are there currently methods for me to unlock and jailbreak the newly bought iPhone to use it myself with another SIM card? Also; 1) Would the vodafone SIM work in another phone, or only in the iPhone it came with? 2) Would unlocking and jailbreaking the phone still mean I could use the unlimited wi-fi, maps and GPS?