JAILBREAK iOS 6.1.3 on iPhone 3GS (New Bootrom)?

I have been looking but no luck. I need a jailbreak that is FREE, untethered, or smei-untethered. My device will not allow me to downgrade so that is not an option or i would be using evasi0n.

There's only a tethered jailbreak using Redsn0w just be patient winocm and ih8sn0w are almost finished developing a untethered iOS 6.1.3 jailbreak should be soon if you use redsn0w it is semi untethered download redsn0w 9.15b3 and iOS 6.0 ipsw and point redsn0w to the iOS 6.0 Ipsw as redsn0w will not support anything over 6.0

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