If you have used a Blackberry device for a significant amount of time, you have probably been the victim of the "butt dial". Butt dialling is when your Blackberry makes calls in your back pocket (or purse, or backpack, etc.) because the keys are pressed accidentally . After a couple of calls to people that you don't want to talk to, you may consider locking your keyboard to prevent it. To enable the keyboard lock on a Blackberry Curve, you only need to press a few buttons.
Go the main screen on your Blackberry Curve. Press the "Blackberry" key (located between the green phone key and the trackball.)
Scroll down the applications screen until you see lock icon near the bottom. This is the keyboard lock application.
Click on the "Lock" icon to use your keyboard lock. When you are ready to use your Blackberry Curve again, press the "Asterisk" key and then the green "Call" button.
Set up a short cut for the keyboard lock by going to "Options" then "Languages." Remove the short cut under "Input Language Selection Shortcut" by choosing "None" from the drop down menu. Save the changes. From that point on, you can press "Alt" then "Enter" from the main screen to use the keyboard lock.