Hello, frindajm, Mobiola xPlayer can fast forward and rewind using the trackball of your BlackBerry. It works on all OS 4.2, 4.3, 4.5 and 4.6. You can download xPlayer for free at Mobiola xPlayer :: BlackBerry :: Download or wap.shapeservices.com. BTW, xPlayer has an additional option of Live Radio, this feature requires a license, all other functionality is free.