There most definitely is. I just did it a couple of days ago.
http://www.redmondpie.com/jailbreak-ios-4.2.1-iphone-4-3gs-3g-ipad-ipod-touch-with-redsn0w-0.9.6b4-guide/
there's the link. Now according to people on youtube, there are certain issues like music/video wont play and some other stuff. So far, my iPhone4 has had NO issues whatsoever. I guess use at your own risk, but I am here to confirm that it DOES indeed work.
All the screenshots are using a Mac, but there is a link towards the bottom for redsn0w Windows version as well, just follow all the instructions, good luck.
There most definitely is. I just did it a couple of days ago.
http://www.redmondpie.com/jailbreak-ios-4.2.1-iphone-4-3gs-3g-ipad-ipod-touch-with-redsn0w-0.9.6b4-guide/
there's the link. Now according to people on youtube, there are certain issues like music/video wont play and some other stuff. So far, my iPhone4 has had NO issues whatsoever. I guess use at your own risk, but I am here to confirm that it DOES indeed work.
All the screenshots are using a Mac, but there is a link towards the bottom for redsn0w Windows version as well, just follow all the instructions, good luck.