A method and system for implementing vehicle functions through a mobile device are provided. More particularly, a technique is implemented for initiating selected vehicle functions through a remote mobile device such as a mobile phone, rather that through a key fob. The system includes network functionality contained within the primary switching element of the network, e.g., a mobile switching center (MSC), to receive an access code (such as *89) from a user. The switching element subsequently transmits command signal(s) via a base station to a vehicle to perform vehicle functions such as locking, unlocking and starting.