How to Jailbreak iPhone 4 ios 6.0.1?

I have tried unsuccessfully to jailbreak my iPnone 4 ios 6.0.1, I have tried numerous sites but each time it has failed. Is there a foolproof way to ensure this can be done?
I would appreciate any advice.

Why to jailbreak when you can unlock for free!
You can unlock for free your iphone (permanently) only with the imei number with a free software.
Works on iphone 2, 3 / 3gs, 4 / 4 s…
I've unlocked my iphone 4 with this software: it's free and very easy to use.
Try it and enjoy your unlocked iphone!

Jailbreaking iOS 6.0.1 is a bit different then usual jailbreaking methods. You also need iOS 6 IPSW file to jailbreak iPhone 4 running iOS 6.0.1. Below is a resource link that will walk you through to jailbreak your device.