Latest iOS that is safe + stable to jailbreak?

[Draeger]

What's the latest iOS that is safely Jailbreakable that I can go to on my iPhone 4?. I'm back in the dark ages with 5.0.1 having not done any updating for ages. I've not been keeping up to date with jail breaking progress so I'm hoping someone can enlighten me.

Ta.

 

[Draeger]

Forgot to say, preferably untethered. I see iOS 6 is possible for A4 devices but its fairly new and currently it's only a tethered option I believe?

 

[Draeger]

Got Tiny Umbrella yeah, pretty sure Cydia has my SHSH blobs too. Been a while since I did this, any chance of a guide on how to go about going from 5.0.1 to 5.1.1?. Link to a website outlining the steps perhaps?. My Googlefu isn't bad but there's quite a few different guides out there.

Can I go from 5.0.1 directly to 5.1.1?.