I'm simply trying to gather information on my 3gs so I can sell it. I've been using the info from www.jailbreakmatrix.com to see whether or not it can be jailbroken and unlocked. I have a couple of questions if you don't mind helping a newbie. 1. Is the Modem Firmware number (in Settings>General>About) the same as the Baseband number? Mine is 05.13.04. In the JailbreakMatrix it only goes up to 05.13.03. Is mine even newer and therefore can't be jailbroken or unlocked? 2. Is what the JailbreakMatrix calls the Firmware 4.0 referring to iOS 4? 3. The methods it describes to find my Boot Loader number seem to only work with a PC. Is there a way I can find this out from my Mac? 4. Finally, in general, if mine can not be unlocked, do you expect it to be possible in the near future? Also, is this info necessary to get top dollar for my used iphone? Thanks so much for your assistance.