Various embodiments concern positioning. The method comprises receiving information relating to radio fingerprint of an apparatus from at least two apparatuses (103); determining estimated positions of said at least two apparatuses according to received information (104); selecting an apparatus from said at least two apparatuses (105); requesting information relating to position of the selected apparatus (106); and iterating the steps for determining, selecting and requesting until estimated positions are determined to be reliable (104-109). In a method for sharing information between devices for positioning purposes nearby device names are scanned and an own name field is modified so that the name field contains information on the scanned nearby device names.