The following are the fixes he made in RC2 version
Fixed 3G issues
Fixed Icy issues
Tethered jailbreak for 3.1 OOTB ipt 8GB and new 3GSes
Both Windows and Mac
If you used RC1 with success, no need to rerun
Download BlackRa1n RC2 Update
Save Battery: If you have an AMOLED screen, by just setting black background as wallpaper, you can extend the phone battery life and can ...