Abstract: A method of updating user profile data involves at least one processor receiving from a mobile device a user identifier and first current position data associated with a first current location of the mobile device. The processor(s) queries a search index with the identifier for a profile associated with the user identifier, determines from the first current position data that the mobile device is outside a default location defined in the profile, and incorporates into the search index profile data in association with first current location information derived from the first current position data. The processor(s) receive(s) from the mobile device the user identifier and second current position data associated with a second current location of the mobile device, determines from the second current position data that the device is within the default location, and removes from the search index the first current location information associated with the profile data.