How to delete backup photos?

Ok i so i recently just got a new iPhone to replace my old one. And the person at the sprint store backed up my contacts and photos. But now i don't want the photos on my phone anymore because i can't delete any of them and i really need to! So i was wondering if I'm able to delete the photos that the sprint lady backed up for me? If its possible to do that from home

Use iTunes to do this. Plug the iPhone to your computer and open iTunes which will show a synchronous display. Then you can export the photos you want to delete. I do not know whether I have made it clear, but you can have a try. All the best!