I just bought an iPhone4 and got it setup. My old SIM is deactivated in my old 3g. I jailbroke and updated my baseband to 6.15.00 (this is all for my 3g). Now in using Cydia, I don't have any Wifi or internet connection and so I can't get the unlocking source added and downloaded. I used Redsnow for everything and have 4.1.2 installed. I have no clue what to do next as I've never done this before! I've read I can use a SIM that is currently activated but only have the one for my iPhone4 which will not fit. Thanks for any help!!