How to my switch verizon iphone 4s to straight talk?

I have recently been told that I can use my iphone for verizon for straight talk. I just need to know how the WHOLE process of switching so whenever my sim card comes in I can immediately switch my phone over.
Thank you so much!
p.s. No bull *** answers! And if you found a website that will give me clear a step by step process please leave a link:)

ST will not work on verizon iphone 4s.
ST will only activate cdma phones it sells.
verizon is a cdma