To make a long story short, I got this phone online from att. Its 2.2.1 and I want to jailbreak it. Should I upgrade it to 3.01 with the OS3.0 or should I just jailbreak it now? Also do I need to remove my att sim card when I jailbreak it?
you can update it, and then jailbreak it. It's pretty simple, and no you don't need to remove your sim card.