The BlackBerry Pearl 8120 has a few visual improvements over earlier versions that give you quicker access to handy features.
The "sym" key, which is also the * key, now sports a tiny padlock symbol, for example. Press and hold the key and the phone enters locked mode. (To unlock, press any key and follow the instructions that come up.)
Similarly, a new icon on the shift key, which is also the # key, hints at its additional function: two wavy lines. They indicate vibrate modepress and hold the key to toggle between a vibrate profile and a normal profile.
Finally, if you're using the phone mode, the little speaker icon on the O-P (and . ) key is your hint that you can readily enter speakerphone mode by pressing it.