Silver 16g iphone 5s

Description:

my iphone 5s would not charge so i sent it to apple to get it fixed but the next day they sent me a brand new iphone but with me upgrading to the 6 i no longer need it. i was with 02 and the phone was locked on that network but with this being brand new im not sure which nejt work it will work on iv been told that the first sim card that goes in lockes it to that network but im not sure on that so im just going to say o2.

i do have a box and charger but sorry no headphones.