I have a 3g running 3.1.2. I recently read this article about preparing for the unteathered jailbreak here. It tells you to start backing up the SHSH and ECID files. Can I start doing this for 3.1.2 (does Apple still sign this firmware?) or do I need to upgrade to 3.1.3? Or is a newer firmware out now? Please help, I'm confused. I have no jailbreak at all right now, but I want to be ready with all the backup files for downgrading when it comes out. Thanks for your help. This is very confusing for noobs.