I used the jailbreakme.com JB yesterday on my IP4 4.01. Very easy, seemed to work great, apart from the servers being slow due to overload. Did nothing but JB the phone yesterday. Installed My3G today, only applied it to the phone app. Never did anything else actually. Phone showed "no service," so I reset -- and BRICKED. Stuck in boot screen. Ran the battery out pretty quickly too. Had to put it in DFU mode and restore.
Just be aware that this can happen and you'll have to get into DFU to restore. Which in my book stands for "Definitely F'd Up" Here's a link about how to get into DFU Mode if you need it. http://osxdaily.com/2010/06/24/iphone-dfu-mode-explained-and-how-to-enter-dfu-mode-on-your-iphone/
I'm going to wait a bit before trying again.
Cheers
Just be aware that this can happen and you'll have to get into DFU to restore. Which in my book stands for "Definitely F'd Up" Here's a link about how to get into DFU Mode if you need it. http://osxdaily.com/2010/06/24/iphone-dfu-mode-explained-and-how-to-enter-dfu-mode-on-your-iphone/
I'm going to wait a bit before trying again.
Cheers