1. A method of determining an indication of the position of an electronic device, the method comprising: obtaining ( 100 ) information relating to a radio signal received by the device, the radio signal comprising transmissions from one or more satellites of a satellite-positioning system, from which information an inference can be made about the true position of the device at the time the signal was received; obtaining ( 110 ) a plurality of different hypotheses about the true position of the device, wherein each hypothesis comprises at least one of: a position in two or more spatial dimensions; a set of positions; and a range of positions; evaluating ( 120 , 130 , 140 ) the plurality of hypotheses, comprising assessing a degree of consistency between the information relating to the radio signal and the hypotheses; based on the outcome of the evaluations, selecting ( 150 ) one or more of the hypotheses; and outputting ( 160 ) an indication of the selected one or more hypotheses.