Follow the instructions on the screen to download the latest version currently available from your wireless service provider. Click "Options," "General Options" and change "Dial From Home Screen" to "No." Review the your phone's User Guide to discover the shortcuts that are specific to your BlackBerry device. Loading... http://dragonplayer.net/how-to/blackberry-ball-not-working.php However, since I've downgraded OS and it suddenly works I don't think my problem is from the case. :/ This is such a weird problem.
This is your resource to discuss support topics with your peers, and learn from each other. I still got the replacement though. If the issue persists, proceed to the next troubleshooting step.