Yes you can. I've done it before.
You can do it.I think you use redsn0w with an iOS 6 ipsw (not 6.1.5 just plain 6), then you go to Cydia and install p0sixspwn to make it untethered.http://www.idownloadblog.com/2013/12/23/p0sixspwn-jailbreak/
I don't get what you do here. What does ipsw mean?
It's a file that contains the operating system information I thinkI'm just trying to find the video I used, it has links with it.
You can't downgrade to previous ios versions anymore because apple put more security measures I think
You don't downgrade, the ipsw is used to trick the program I think.Try this tutorial:http://www.youtube.com/watch?v=JbKL37110rQI literally did this same thing yesterday.