This works with PhoneGap / Cordova applications. It should happen automatically when you configure the application to run in fullscreen mode but it doesn’t for now.

Instead of this sufficing:

<preference name="fullscreen" value="true" />

You have to include the following plugin in the config.xml file:

<gap:plugin name="org.apache.cordova.statusbar" />

And add this snippet to your index (or JavaScript) file:

document.addEventListener("deviceready", startEvents, false);
function startEvents() {

Hope it helps!

PhoneGap issue (GitHub):