Values may be tracked from wireless sensors of a vehicle indicative of distance between the mobile device and the sensors. When the values over time indicate approach and then departure of the device to a first side of the vehicle and consistent approach of the device to a second side of the vehicle, the device may be associated with a seating zone of an identified closest pair of the sensors. Wireless sensors may be proximate to entrances to a vehicle. The vehicle may track values from the sensors indicative of distance between a mobile device and the sensors; calculate pair values as sums of the values received from pairs of the sensors proximate vehicle entrances; and identify one of the entrances through which the mobile device passed according to the pair value with a minimum value closest to a distance between the pair of the sensors.