iphone 3GS 8GB Brand New Replacement ?

Got this replacement phone from Apple a couple of weeks ago as the battery on my original phone was faulty, managed to do this just before my years warranty was up, It is brand new and comes complete with box and charger, its on the 3 Network and could probably be unlocked to other networks but i am not 100% sure, Has only been swiched on to make sure all is working ok and all works perfect, Was going to keep it as a spare as I have just upgraded but think its too good to sit in a drawer gathering dust, would make an ideal xmas present. Fixed price, will keep otherwise, no scammers.