Do you know that your BlackBerry has a log file where it keeps a detailed record of every single action that you perform on the device including your incoming and outgoing phone calls?
To view the log file of your own BlackBerry, go to the home screen, hold the ALT key and press LGLG. If you are using a BlackBerry Storm, display the keyboard in portrait view, hold the number key for while to lock the number keyboard and then type ,5,5 to display the phone log.
Your BlackBerry Call History is in the Debug Logs
These debug logs may sometimes help you troubleshoot issues with your BlackBerry but there’s one related issue that you should be aware of.
Even if you remove the SIM card from your BlackBerry and manually clear all the phone call logs, one can easily read your dialed and incoming phone numbers list from the debug log.
This won’t be an issue for most BlackBerry users but if you ever plan to giveaway or sell your old phone, remember to clear the debug logs manually as well. Unfortunately, BlackBerry doesn’t offer a way for you to turn off logging permanently. Thanks @RajivMakhni.