I have a 3gs, 3.1.2 (7D11), firmware 05.11.07, Model MB717LL. According to what I've read and using f0recast, I have a beautiful old bootrom 3gs and should be able to JB using blackra1n. That said, I've read a lot through the forum to update my JB knowledge in since I JB my original phone months ago and it doesn't appear that you can back up shsh anymore with saurick for 3.1.2 so what is the best way to JB and keep it JB? It looks like sn0wbreeze is my only option to JB and keep a custom shsh while operating as a 3.1.3 phone. I am a windows 7 user and do not want to JB with blackra1n again only to have the phone crash shortly after and be stuck with a stock 3.1.3 phone. Thank you .