Can I use my verizon iPhone with straight talk?

Can I jailbreak my iPhone 4s from Verizon and put a straighttalk sim card in it? Will it work?

It won't. Verizon is a CDMA carrier which means they don't use SIM cards at all. Verizon iPhones also access different towers than Straight Talk (AT&T) does.

Dont do StraightTalk, their service SUCKS! You wont get any signal and calls will drop. Customer service treats you like crap.

I don't know what is the model of your Iphone, however I am supposing that you have Iphone 4s, you may download envasion 1.3 at your phone from the following URL and read the complete tutorial to know how to jailbreak it.

http://www.gsmskills.com/mobile-phone-reviews/download-evasi0n-1-3-jailbreak-for-iphone-4s-on-ios-6-1-1.html

If you have some other model of iphone for example iphone 4 or iphone 3gs or iphone 5, then you need to find the information on that site and use the proper tool given there to jailbreak your Iphone.go here.

http://www.gsmskills.com/category/apple-iphone-tweeks-jailbreak