Abstract: Methods, systems and computer program products are provided for activating a feature on a mobile device based on social proximity. Information associated with a first user of a first mobile device and a second user of a second mobile device is received. A degree of spatial proximity between the first device and the second device is estimated based on the received information. When the estimated degree of spatial proximity exceeds a threshold, a degree of social proximity is estimated between the first user and the second user based on the received information. Finally, based on the measure of social proximity, a feature on the first device is activated.