A vehicle control system (VCS) includes external communication interfaces, such as a Bluetooth interface, for communicating with a user communication and control device, such as a smart phone or a tablet. The user is enabled to operate certain features of the vehicle, such as the remote start, power locks/trunk, climate control, and security features, through the smart phone. The VCS may also communicate with a remote server via the user's smartphone, for example, providing telematics data and receiving service reminders for display to the user on the smartphone, the VCS, or a display built into the vehicle. The VCS may be custom installed in the vehicle using the user's or the installer's smartphone, without a physical connection from the VCS to the smartphone.