What do i need to do to get a untethered iPhone4?

I want to jailbreak my iPhone 6.1.3 I don't mind what i have to do like downgrade or whatever i just want to untethered jailbreak.i'm pretty sure i don't have ssh blobs but i'm not sure really need help! I have a second iPhone 4 on 5.1.1 but don't wanna go down that low and an iPad mini on ios 6.0:) Help quick!

Added (1). Can i just press shift and restore to say 6.0:) and then jailbreak?

Try restoring it

OK, you can downgrade to a lower iOS that the one that is being signed by Apple, and that is 6.1.3. Currently there's only a tethered jailbreak for iPhone 4 on 6.1.3.

The iPhone on 5.1.1 can be jailbroken untethered.

The iPad mini on 6.0 can also be jailbroken untethered.

http://www.isthereajailbreak.com/