Default [Q] is it possible to change the bands on a verizon s3 to work with straight talk ?

is it possible to change the bands on a verizon s3 to work with straight talk and get 4g?

so i have an unlocked galaxy s3 from verizon on straight talk now but im only getting edge data speeds i heard that its not possible to get 4g because the frequency bands are different. does anyone have any experience with this?