swap my i phone 4 16gb black(o2) forsamsung galaxy s2 or galaxy note with same money ?

i swap my i phone 4 16gb black(o2) for Samsung galaxy s2 or galaxy note with same money.i have the phone 5 months only its almost new with original box case and charger with usb the phone is in a very good condition so and the phone that i take i want the same . only collection in person