A computer includes a processor and a memory storing instructions executable by the processor to, in response to a mobile device synchronizing with a vehicle, identify a first profile from a plurality of profiles stored in the memory as associated with the mobile device by extracting a predetermined set of information from data storing contact information for a plurality of contacts on the mobile device and determining that the predetermined set of information matches data in the first profile; determine that a person associated with the first profile is an operator of the vehicle; and then perform an operation in accordance with at least one setting stored in the first profile.