Source: GM/ gm.com

Sure,  it’s sounds  funny, but:

Chevrolet and OnStar unveiled the auto industry’s first working smartphone application that will allow Chevrolet Volt owners 24/7 connection and control of vehicle functions and OnStar features remotely.
OnStar’s Mobile Application allows drivers to communicate with their Volt from Droid by Motorola, Apple iPhone and Blackberry Storm smartphones. It uses a real-time data connection to perform tasks from setting the charge time to unlocking the doors.
The Chevrolet Volt OnStar smartphone application is designed to enhance the overall Volt ownership experience with interaction and control never offered before on any electric vehicle.

“The Chevrolet Volt ushers in a new era of automotive technology and calls for a new level of connectivity and control,” said Walt Dorfstatter, president, OnStar. “Nearly 6 million vehicles on the road today use OnStar to stay connected, and our new smartphone app will make that even easier for Volt drivers.”

Direct link: link