Hi guys, I have a black iPhone 4 on AT&T and I want to jailbreak it. Its on the 4.2.1 OS and has a baseband of 03.10.01. I want the process to be as quick and as painless as possible. Is there a tutorial I can follow somewhere which can guide me through how to do this? The only time I have ever jailbroken an iPhone was a 3G, and I just used Spirit which did it in like 10 seconds, haha. Thanks, I appreciate your help!