I'm looking at buying the iPhone 5c?

So I'm looking at buying the iPhone 5c but it says I need to pay 49.99 up front and I don't know what that means can anyone help/answer please and thanks in advance.

It means you would have to pay 49.99 as well as the monthly contract fee that you are paying.

Sounds self explanatory to me - what part of "up front" (if those were the words used) do you not understand? Try attaching a link to this question if you need people to explain it to you.