As long as u clean off the back of the VZW iPhone really well and then spray the back of the iphone then take the zagg off very carefully with tape, it does stretch, then put it on, spray the zagg while on, position it exactly, then lightly apply pressure to get it to stay in place, dry it, then let it settle for an hour, you should be good. LOL
I did this when switching from a black VZW iPhone 4 to a white one. Worked fine.