Blackberry uses Alt keys to operate any codes. Only for IMEI checking it uses universal *#06# codes.
Here's some secret codes / hidden commands to tweak fast.
ALT+SHIFT+DEL : Reboot system
ALT+LSHIFT+H : System information
ALT+NMLL : This is a good one to show off your BB to others. It will display signal meter to numeric dBm from standard bars. You may find -67 or something like that. It changes to show how closer you're from your network.
If ur bb is hooking frequently then u have 2 clear ur eVent log nd u will do that by holding ALT+LGLG then click on options nd clear event log.....nd ur bb will b hooking relieved hope this will help u a little.