Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5) I want to try out 4.3 but I'm afraid that if I do, I will be completely stuck with it until a jb. I'm currently running 4.2.1 on an iPhone 4. Is it safe for me to update just to try it out? I plan on restoring back to 4.2.1 again if it is. I have shshs backed up apparently for 4.3 somehow, and also 4.1, 4.2.1, and a bunch if betas.