As the title states, I just sold my unlocked and jailbroken 3GS on ebay (jb to 4.0 using pwnage and baseband is at 4.26.08). I also installed the latest ultrasn0w and I'm wondering if the person who bought it will be able to just pop in his t-mobile sim card and start using the phone right away. I know that when you use pwnage to create your custom ipsw there's an "activate the phone" option which I did not check since I'm with AT&T; however, should I have checked that anyway just in case the person I sold my phone to is not with AT&T? Does that even matter? If so, should I just re-jb with pwnage and select the activate phone option? Also, I don't have a sim that will work in that phone anymore so I don't know if that's going to be a problem if I have to re-jb. I want to send this phone out to him tomorrow so hopefully someone can help me out with this sooner rather than later. Thank you!