When you want to change from iphone 4 to iphone 5 do they transfer your pictures too?

I have an iphone 4 ( with Sprint ) and i already have 2 years with it so i can upgrade and i'm wondering if i should because i have my pictures ( i know your contacts they do transfer them if had it done from a blackberry to my iphone 4 two years ago ) so i have my prized possessions ( my pictures ) and i don't want them lost so i'm wondering if i should, somebody give me answers!

You can if you save your photos on to your laptop and or Itunes when you get your Iphone 5 you can transfer them onto there.

Get the app Dropbox it's free and when I changed my phone it helped really well XX