sorry for lack of detail, im aware of the different data packages for types of smart phones, and my question is about the actual package not hard data on the hdd. what i really am looking for is say i order a sony experia... or another smart phone/blackberry if i swap my sim if data xfer will still work because i do not want to change my data plan and loose my unlmited for iphone but need a new phone and am not eligable to upgrade plus u cannot get a sony erricson on contract anyway