iphone 4s in white swap for SONY XPERIA S +

got an iphone 4s in white 1 month old its 16gb good condition i have had screen protectors on and case since i got it, i would like to swap for an SONY XPERIA S must be in good condition. thanks just use the reply but on here as am not putting my phone number u here again because i was getting loads of calls though the night and i got kids. i will reply straight away