Elements Interactive has released a free version of the popular Tetris brick game for the following mobile devices:

Windows Mobile Pocket PC
Windows Mobile Smartphone
Symbian 9.1 Series 60 (S60) v2 and 3
Symbian Series 80 (Nokia Communicator)
Symbian Series 90 (Nokia 7710)
Symbian 9.1 UIQ
Gamepark Holdings GP2X

Download Page- http://www.elementsgames.com/stris2/downloads.php