Remote unlock sprint iphone 4s?

I have 3 iphone 4s's with sprint but we're in a place where the service is terrible. I want verizon but I don't want to buy new phones when I have one.

You're gonna have to get a new phone. Verizon won't activate any phone that's not already on their network.

You can contact with the verizon whether they can give you the service in the area you are staying now. But if you feel to buy the new phones you can grab the refurbished one. Try out the link.