Backup Your iPhone’s Unlock Activation Ticket Using Redsn0w

Step 1: Make sure your device has the afc2 service enabled. Most jailbreaks cater to it, but if not, you can grab it from the ModMyi repository in Cydia.
Step 2: In the new Redsn0w, navigate through Extras > Even More > Backup
Step 3: That’s pretty much it. By default, Redsn0w will backup your activation records from /var/root/Library/Lockdown, and without going into too much detail, it leaves your device’s future unlock status in good stead.
The iPhone Dev Team has promised to comment on the SAM unlock, and in jailbreak terms, it’s almost like waiting for an official press release!
Download RedSn0w 0.9.10 beta 8 for Windows
Download RedSn0w 0.9.10 beta 8 for Mac