Sorry for posting again. I was able to jailbreak my iPad with 4.2.1. I installed the complete updates in Cydia, then downloaded MyWi and installed it. It asked me to reboot so I did so and then now iPad hangs at the Apple icon. I pretty much just install the MyWi app straight from Cydia, I wonder why there's a problem. It seems there's so much problem with the new version of the iPad, anyone knows what's the issue? Thanks again for all the help.