Iphone 4 swap for iphone 4s or £280 ?

here i have a iphone 4 white 16gb and would like a iphone 4s the phone has just got a new screen and back no marks on the phone. also willing to sell for 280 no lower thanks for reading. text 07790452028 locked on orange and tmobile can be unlocked for 20. all boxed up just opened to check everythings working. 1 week old will show reciept to prove its a genuine sale. no offers at all- quick sale pick up from east london call on 07891617232 Galaxy note white simfree never used brand new in Box and everything brandnew bargain price With receipt No offer thanks HI THERE SELLING MY BB BOLD 9900 ITS IN EXCELLENT CONDITION AND HAS NOT BEEN USED MUCH SELLING DUE TO HAVING A IPHONE ITS UNLOCKED TO ALL NETWORKS AND ALL ACCESSORIES INCLUDED I I AM SELLING MY SAMSUNG S2 UNLOCKED FULLY BOXED EXCELLENT CONDITION SCREEN PROTECTOR ON FROM NEW COMES WITH 6MTHS LEFT OF SAMSUNG WARRANTY RUNNING LASTEST SOFTWARE comes with all leads and paperwork and recipte any questions please call or text no offers