Ok, I read up on the "PwnageTool 3.1.4" and downloaded the program. But before I go through and JB my iPhone 3gS I have a couple questions for fellow iphone users/owners. (1). Is there a way to "undo" the jb (if I understood it right, I would just have to put my phone in recovery mode and allow itunes to do its magic, but will then also be back at 3.1.2 official apple fireware) (2). Do I loose the MMS texting (i mean the official one, I understand there is MMS programs that allow for the same thing) (3). Will I still be allowed to download "official" applications from the App Store?