5830i hard resety ?

IPHONE 4 16GB SWOP FOR IPHONE 4 WHITE
ive got a black iphone 4 16gb mint condition comes with boxed charger n plug n sim removal tool..... this fone is fully working order and locked on the 3 network .... Lookin to swop this for a white iphone 4 possible 3g network but not botherd must have charger.......... PLEASE READ THIS ADDD NO CASH SALE SWOPS ONLI