- Did you lock your keyboard by pressing the lock button? When you press the lock button again, does the screen remain blank? Try pressing the escape key (it looks like a u-turn) to force the display to re-appear. Then try pressing the lock button again.
- Do you see an error message about an uncaught trap? In the body of the message may be a cryptic reference to the program that caused the problem. In my case it was the Blackberry Messenger Application. I deleted the application, the uncaught trap message went away, and my Blackberry stopped freezing. Re-loading Blackberry Messenger should fix the problem.
- When you move from one application to another do you "exit" the application or use the escape key to move to the next application? If you do not select "exit" from the drop down menu, that application is still running in the background when you switch to the next application. Applications that are running in the background are using memory. If you use too much memory, your Blackberry freezes. Practice "exiting" an application when you are done with it.
- When all else fails, your cellphone may need to be rebooted. Remove the battery and re-insert the battery. If re-booting the cellphone is becoming a daily occurrence, the next fix is wiping out your cellphone's operating system and re-installing it along with all the applications, themes, music and pictures you added since you bought the cellphone. Before attempting this, you must make a current backup of your cellphone by using the Blackberry Desktop Application. This can be a complex, time consuming process. I would suggest having an IT Professional do this for you.