A method , at a first mobile device (104-1), comprising: identifying a presence of a second mobile device (104-2) based, at least in part, on an exchange of one or more messages over a wireless communication link, the first mobile device and the second mobile device being co-located with an object; determining a first operative condition of the first mobile device, and a second operative condition of the second mobile device; and determining that only the second mobile device is classified as being available for wireless signal based positioning, the determination being based, at least in part, on the first and second operative conditions, and in response to the determination: obtaining one or more positioning measurement values based, at least in part, on one or more wireless signals received by the second mobile device, the one or more positioning measurement values being usable for determining a position fix for the first and second mobile devices; and initiating a transition of a power state of the first mobile device between a higher power usage state and a lower power usage state, the transition of the power usage state comprising reducing/removing power to one or more receivers of the first mobile device for obtaining one or more positioning measurement values based, at least in part, on one or more wireless signals. identifying a presence of a second mobile device (104-2) based, at least in part, on an exchange of one or more messages over a wireless communication link, the first mobile device and the second mobile device being co-located with an object; determining a first operative condition of the first mobile device, and a second operative condition of the second mobile device; and determining that only the second mobile device is classified as being available for wireless signal based positioning, the determination being based, at least in part, on the first and second operative conditions, and in response to the determination: obtaining one or more positioning measurement values based, at least in part, on one or more wireless signals received by the second mobile device, the one or more positioning measurement values being usable for determining a position fix for the first and second mobile devices; and initiating a transition of a power state of the first mobile device between a higher power usage state and a lower power usage state, the transition of the power usage state comprising reducing/removing power to one or more receivers of the first mobile device for obtaining one or more positioning measurement values based, at least in part, on one or more wireless signals. obtaining one or more positioning measurement values based, at least in part, on one or more wireless signals received by the second mobile device, the one or more positioning measurement values being usable for determining a position fix for the first and second mobile devices; and initiating a transition of a power state of the first mobile device between a higher power usage state and a lower power usage state, the transition of the power usage state comprising reducing/removing power to one or more receivers of the first mobile device for obtaining one or more positioning measurement values based, at least in part, on one or more wireless signals. <EOS>