Hello o/ I have AT&T and I would like to know how much it costs to exchange a phone?

I have a Nokia Lumia 925 and I really don t like it all that much and I ve had it for a little over a year. I have it on a two year contract and I would like to exchange it for some sort of Android phone but I don t know how much it costs. My mom can t afford it but if it s a little under $99 I can pay for it myself. I don t know how much it would cost for a semi new android so that s why I m here. Please leave serous answers. Thanks!

Read more: Hello o/ I have AT&T and I would like to know how much it costs to exchange a phone?