Hi, I just received an iPhone 3GS, its on baseband 04.15.00 and jailbroken on firmware 4.2.1. I've done quite a bit of unlocking before, so this procedure isn't new to me. However, in this situation I am stumped because I've been trying to update to iPad 06.15.00BB on a Mac using the Pwnage Tool Special Unlock Edition (4.1.3) with iTunes 4.2.1. It was successfully jailbroken but no BB update so I cannot unlock with ultran0w 1.2.3. My next thought would be to drop an unmodified firmware with a baseband that is unlockable by ultran0w 1.2.3 and then just pwn it up 4.3.3 preserving the baseband. Any pointers?