As stated in the title, I have an iPhone 3GS with 4.3.3 with baseband 05.16.02. Is it possible to upgrade it to the iPad baseband in order to unlock it with ultrasn0w? All the guides I've read seem to indicate it needs to be on 4.1 or 4.2.1 to upgrade the basebad through pwnage tool. Is it possible to still upgrade on 4.3.3?