If you cache as station when you hook the phone up to your computer with the usb it will save those station. Once saved you can listen to them with the radio off (not streaming). Good for use on airplanes or bad wireless signal
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When you use slacker, Click the menu button (while listening
to the desired station of course)
Example: Hip Hop Hits
Click the menu button and click on Cache Station
and the next time you plug in to USB it should give
you the option to laucnh Slacker and sync your
stations.