A system and method for obtaining data during a multi-way call involving at least a vehicle telematics unit, call center, and third party such as a public safety answering point (PSAP). While connected together in at least a three-way voice call, the connection from the telematics unit is switched out of the call and connected to a data modem to receive vehicle data uploaded from the telematics unit. This can be used to provide vehicle location and other vehicle information such as current vehicle conditions and operational state. Thereafter, the telematics unit connection is switched back into the multi-way call to permit continued voice communications between the parties. The uploaded vehicle data can then be used by the call center or PSAP to provide emergency or other assistance.